{"title":"Hurst Engineering","description":null,"products":[{"product_id":"hurst-engineering-5-lug-conversion-kit-for-gm-12-bolt-truck-02-110","title":"Hurst Engineering 5 Lug Conversion Kit for GM 12-Bolt Truck - 02-110","description":"Early GM trucks all came with 6 lug axles.  Not only does this limit your wheel choices, but it restricts your options on brakes as well.  Hurst Engineering is here with the solution of our 5-lug axle conversion kits.  These kits include axles, axle seals\/bearings, spider gears, drums, and studs.  The axles are made from 1541H alloy for supreme strength and durability.  This kit is designed for the 8.875 12-Bolt rear end with the axles featuring 30 spline ends, a 5x5\" lug pattern, and are 30-3\/4\" in length.  Look to Hurst Engineering for your truck axle needs.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eComplete kit to make intallation a breeze\u003c\/li\u003e\n\u003cli\u003eHeat treated high quality 1541H alloy for strength and durability\u003c\/li\u003e\n\u003cli\u003e30 Spline and 30-3\/4\" long for a direct replacement\u003c\/li\u003e\n\u003cli\u003e5 x 5\" lug pattern\u003c\/li\u003e\n\u003cli\u003eFits 8.875\" GM Truck 12 Bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1964 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Drive Axle Shaft Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e 5-Lug Conversion Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Length:\u003c\/strong\u003e 30-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Bolt Pattern (in):\u003c\/strong\u003e 5x5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723024834798,"sku":"HUU-02-110","price":727.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/54bb12f78198ce02958ead86d3e3444194e2490f.jpg?v=1791647663"},{"product_id":"hurst-engineering-ring-pinion-for-gm-12-bolt-truck-3-73-ratio-thick-gear-02-111","title":"Hurst Engineering Ring \u0026 Pinion for GM 12-Bolt Truck 3.73 Ratio THICK GEAR - 02-111","description":"Everyone has different needs for their truck.  One of the most dramatic changes you can make to a vehicle are the rear ring and pinion gears.  Whether you are going for aggressive low-end response for performance and towing, you're looking to make your truck a highway cruiser, or you have made a change to your wheel and tire size, we have a ring \u0026amp; pinion for you.  Hurst engineering offers gear sets ranging from 3.08 to 4.56 for the GM 12-bolt rear ends to get you exactly where you need to be. \"THICK\" gear sets indicate that they are compatible with 3.42 and down differentials.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3.73 ratio THICK gear\u003c\/li\u003e\n\u003cli\u003eFits GM 12-Bolt differentials\u003c\/li\u003e\n\u003cli\u003eGear tooth finish reduces friction and heat for longevity\u003c\/li\u003e\n\u003cli\u003eHigh grade steel for strength and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1987 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 3.73\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Differential Ring and Pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ring \u0026amp; Pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\nTHICK style ring and pinion are compatible with 3.42 and down differentials.","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723025785070,"sku":"HUU-02-111","price":399.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/89e30102414280d51082a4a6c2eab9ae81a71ac7.jpg?v=1791647664"},{"product_id":"hurst-engineering-ring-pinion-for-gm-12-bolt-truck-4-56-ratio-02-114","title":"Hurst Engineering Ring \u0026 Pinion for GM 12-Bolt Truck 4.56 Ratio - 02-114","description":"Everyone has different needs for their truck.  One of the most dramatic changes you can make to a vehicle are the rear ring and pinion gears.  Whether you are going for aggressive low end response for performance and towing, you're looking to make your truck a highway cruiser, or you have made a change to your wheel and tire size, we have a ring \u0026amp; pinion for you.  Hurst engineering offers gear sets ranging from 3.08 to 4.56 for the GM 12-bolt rear ends to get you exactly where you need to be.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4.56 ratio\u003c\/li\u003e\n\u003cli\u003eFits GM 12-Bolt differentials\u003c\/li\u003e\n\u003cli\u003eGear tooth finish reduces friction and heat for longevity\u003c\/li\u003e\n\u003cli\u003eHigh grade steel for strength and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1987 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 4.56\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Differential Ring and Pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ring \u0026amp; Pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723026735342,"sku":"HUU-02-114","price":349.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/2bae49934f44cfb55a57e7c76867f3bbd9311444.jpg?v=1791647666"},{"product_id":"hurst-engineering-6-lug-replacement-rear-axle-for-gm-12-bolt-truck-02-116","title":"Hurst Engineering 6 Lug Replacement Rear Axle for GM 12-Bolt Truck - 02-116","description":"Time can be rough on your axles, especially for a 4WD. Years of use and abuse can cause damage to the splines of bearing surfaces. Hurst Engineering axles are made from 1541H alloy for strength and durability. Our replacement axles for 1970-1981 K trucks with a 8.875 12-Bolt feature 30 splines, 6 x5.5\" lug pattern and are 31 7\/16\" long. Look to Hurst Engineering for your truck axle needs.\r\n\n\r\n\nSold individually.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeat treated high quality 1541H alloy for strength and durability\u003c\/li\u003e\n\u003cli\u003e30 Spline and 31 7\/16\" long for a direct replacement\u003c\/li\u003e\n\u003cli\u003e6 x 5.5\" lug pattern\u003c\/li\u003e\n\u003cli\u003eFits 8.875\" GM Truck 12 Bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1970-1981 Chevy\/GMC K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Drive Axle Shaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Axles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Length:\u003c\/strong\u003e 31-7\/16\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Bolt Pattern (in):\u003c\/strong\u003e 6x5.5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723027390702,"sku":"HUU-02-116","price":299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/d410df22c849e3dcb53d98fafc00ad2372659d08.jpg?v=1791647667"},{"product_id":"hurst-engineering-5-lug-replacement-rear-axle-for-gm-12-bolt-truck-02-117","title":"Hurst Engineering 5 Lug Replacement Rear Axle for GM 12-Bolt Truck - 02-117","description":"Time can be rough on your axles. Years of use and abuse can cause damage to the splines of bearing surfaces. Hurst Engineering axles are made from 1541H alloy for strength and durability. Our replacement axles for 1971-1981 C series trucks with a 8.875 12-Bolt feature 30 splines, 5 x5\" lug pattern, and are 31-7\/16\" in length. Look to Hurst Engineering for your truck axle needs.\r\n\n\r\n\nSold individually.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeat treated high quality 1541H alloy for strength and durability\u003c\/li\u003e\n\u003cli\u003e30 Spline and 31 7\/16\" long for a direct replacement\u003c\/li\u003e\n\u003cli\u003e5 x 5\" lug pattern\u003c\/li\u003e\n\u003cli\u003eFits 8.875\" GM Truck 12 Bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1971-1980 Chevy\/GMC C Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Drive Axle Shaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Axles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Length:\u003c\/strong\u003e 31-7\/16\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Bolt Pattern (in):\u003c\/strong\u003e 5x5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723028013294,"sku":"HUU-02-117","price":299.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/5e7bd4516197f9d3a730fed6ac98347e3feeb0ba.jpg?v=1791647668"},{"product_id":"hurst-engineering-5-lug-conversion-axle-for-gm-12-bolt-truck-02-119","title":"Hurst Engineering 5 Lug Conversion Axle for GM 12-Bolt Truck - 02-119","description":"Early GM trucks all came with 6 lug axles.  Not only does this limit your wheel choices, but it restricts your options on brakes as well.  Hurst Engineering is here with the solution of our 5 lug conversion axles.  These axles are made from 1541H alloy for supreme strength and durability.  Our axles made for the 8.875 12-Bolt rear end feature 30 spline ends, a 5x5\" lug pattern, and are 30-3\/4\" in length.  Look to Hurst Engineering for your truck axle needs.\r\n\n\r\n\nSold individually.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeat treated high quality 1541H alloy for strength and durability\u003c\/li\u003e\n\u003cli\u003e30 Spline and 30-3\/4\" long for a direct replacement\u003c\/li\u003e\n\u003cli\u003e5 x 5\" lug pattern\u003c\/li\u003e\n\u003cli\u003eFits 8.875\" GM Truck 12 Bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1969 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Drive Axle Shaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Axles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Length:\u003c\/strong\u003e 30-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Bolt Pattern (in):\u003c\/strong\u003e 5x5\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n1963-1964 applications use axle seals with 2.535\" OD. 1965-1969 applications use axle seals with 2.579\" OD.","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723028635886,"sku":"HUU-02-119","price":371.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/f675b30ea19a89f0cea79ebd7b2170acd8a00480.jpg?v=1791647670"},{"product_id":"hurst-engineering-master-overhaul-kit-for-gm-12-bolt-truck-rear-axle-02-120","title":"Hurst Engineering Master Overhaul Kit for GM 12-Bolt Truck Rear Axle - 02-120","description":"Hurst Engineering Master Overhaul Kits provide you with all the parts needed to properly overhaul your trucks 8.875\" 12-Bolt rear axle. Our kits include Timken bearings and high quality seals for a worry free installation. Hurst Engineering kits are the most comprehensive kits available and include carrier bearings, pinion bearings, pinion seal, shim kit, crush sleeve, pinion nut, ring gear bolts, thread locker, gear marking compound, and rear cover gasket. This kits works well to overhaul your worn rear axle or when replacing a carrier or ring gear.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIncluded Timken bearings for long lasting quality\u003c\/li\u003e\n\u003cli\u003eEverything included for a complete axle overhaul\u003c\/li\u003e\n\u003cli\u003eHigh Quality seals for a leak free installation\u003c\/li\u003e\n\u003cli\u003eFits 8.875\" GM Truck 12 Bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1987 Chevy\/GMC C\/K Series Trucks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Drive Axle Shaft Bearing Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Axle Overhaul Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723029258478,"sku":"HUU-02-120","price":221.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/a3ccd19152339eaaf785f3db69cd54099ff13dbe.jpg?v=1791647671"},{"product_id":"hurst-engineering-5-lug-conversion-kit-for-gm-12-bolt-truck-02-121","title":"Hurst Engineering 5 Lug Conversion Kit for GM 12-Bolt Truck - 02-121","description":"Early GM trucks all came with 6 lug axles.  Not only does this limit your wheel choices, but it restricts your options on brakes as well.  Hurst Engineering is here with the solution of our 5 lug axle conversion kits.  These kits include axles, axle seals\/bearings, drums, and studs.  The axles are made from 1541H alloy for supreme strength and durability.  This kit is designed for the 8.875 12-Bolt rear end with the axles featuring 30 spline ends, a 5x5\" lug pattern, and are 30-3\/4\" in length.  Look to Hurst Engineering for your truck axle needs.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eComplete kit to make intallation a breeze\u003c\/li\u003e\n\u003cli\u003eHeat treated high quality 1541H alloy for strength and durability\u003c\/li\u003e\n\u003cli\u003e30 Spline and 30-3\/4\" long for a direct replacement\u003c\/li\u003e\n\u003cli\u003e5 x 5\" lug pattern\u003c\/li\u003e\n\u003cli\u003eFits 8.875\" GM Truck 12 Bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1965-1969 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Drive Axle Shaft Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e 5-Lug Conversion Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Length:\u003c\/strong\u003e 30-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Bolt Pattern (in):\u003c\/strong\u003e 5x5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723029749998,"sku":"HUU-02-121","price":519.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/ed24c0fbcd85c47ee42b1fc58ee007193a035561.jpg?v=1791647673"},{"product_id":"hurst-engineering-5-lug-conversion-kit-w-limited-slip-differential-gm-12-bolt-gr-3-42-down-02-122","title":"Hurst Engineering 5-Lug Conversion Kit w\/Limited Slip Differential,GM 12-Bolt,GR 3.42 \u0026 Down - 02-122","description":"Early GM trucks all came with 6 lug axles.  Not only does this limit your wheel choices, but it restricts your options on brakes as well.  Hurst Engineering is here with the solution of our 5 lug axle conversion kits.  These kits include axles, limited slip differential, and drum brake assemblies.  The axles are made from 1541H alloy for supreme strength and durability.  This kit is designed for the 8.875 12-Bolt rear end with the axles featuring 30 spline ends, a 5x5\" lug pattern, and are 30-3\/4\" in length.  Look to Hurst Engineering for your truck axle needs.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eComplete kit including limited slip differential to make intallation a breeze\u003c\/li\u003e\n\u003cli\u003eHeat treated high quality 1541H alloy for strength and durability\u003c\/li\u003e\n\u003cli\u003e30 Spline and 30-3\/4\" long for a direct replacement\u003c\/li\u003e\n\u003cli\u003e5 x 5\" lug pattern\u003c\/li\u003e\n\u003cli\u003eFits 8.875\" GM Truck 12 Bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1969 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferential Type:\u003c\/strong\u003e Limited Slip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Drive Axle Shaft Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e 5-Lug Conversion Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Length:\u003c\/strong\u003e 30-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Bolt Pattern (in):\u003c\/strong\u003e 5x5\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\nFits 3.42 \u0026amp; Down Ratio or Thick Gears","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723030405358,"sku":"HUU-02-122","price":1249.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/a5c9bd93eb516ded9107dad2c3cbfc6e5a4878e7.jpg?v=1791647674"},{"product_id":"hurst-engineering-5-lug-conversion-kit-limited-slip-differential-gm-12-bolt-gr-3-73-up-02-123","title":"Hurst Engineering 5-Lug Conversion Kit - Limited Slip Differential,GM 12-Bolt, GR 3.73 \u0026 Up - 02-123","description":"Early GM trucks all came with 6 lug axles.  Not only does this limit your wheel choices, but it restricts your options on brakes as well.  Hurst Engineering is here with the solution of our 5 lug axle conversion kits.  These kits include axles, limited slip differential, and drum brake assemblies.  The axles are made from 1541H alloy for supreme strength and durability.  This kit is designed for the 8.875 12-Bolt rear end with the axles featuring 30 spline ends, a 5x5\" lug pattern, and are 30-3\/4\" in length.  Look to Hurst Engineering for your truck axle needs.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eComplete kit including limited slip differential to make intallation a breeze\u003c\/li\u003e\n\u003cli\u003eHeat treated high quality 1541H alloy for strength and durability\u003c\/li\u003e\n\u003cli\u003e30 Spline and 30-3\/4\" long for a direct replacement\u003c\/li\u003e\n\u003cli\u003e5 x 5\" lug pattern\u003c\/li\u003e\n\u003cli\u003eFits 8.875\" GM Truck 12 Bolt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1969 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferential Type:\u003c\/strong\u003e Limited Slip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Drive Axle Shaft Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e 5-Lug Conversion Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Length:\u003c\/strong\u003e 30-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Bolt Pattern (in):\u003c\/strong\u003e 5x5\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\nFits 3.73 \u0026amp; Up Gear Ratio","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723031093486,"sku":"HUU-02-123","price":1249.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/d931f79b37bf370503ce6f64b4e026fb1ab92acf.jpg?v=1791647675"},{"product_id":"hurst-engineering-limited-slip-differential-gm-12-bolt-truck-gearratio-2-76-3-42-02-124","title":"Hurst Engineering Limited Slip Differential-GM 12-Bolt Truck,GearRatio 2.76-3.42 - 02-124","description":"Are you stuggling for traction, or just have some terrible noise coming from the GM 12-bolt in your truck?  Hurst Engineering Limited Slip Differentials offer great traction and strength, but are not overly aggressive for the street. These differentials are 4-spring, composite, clutch-style, limited-slip carriers-with internal gears machined from forged 4320 steel and stronger teeth.  These differentials are for GM 12-bolt 30 spline rear ends, and are compatible with 2.76-3.42 ring \u0026amp; pinion gears. Get rid of that old open differential and upgrade to a limited slip unit!\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFits 2.76-3.42 Gear Ratio (Also Fits Thick Gears)\u003c\/li\u003e\n\u003cli\u003eFits 12T GM with 30 Spline Axles\u003c\/li\u003e\n\u003cli\u003eComposite Clutches for great driveability\u003c\/li\u003e\n\u003cli\u003eFeature 4320 chromoly spider gears for ultimate durability\u003c\/li\u003e\n\u003cli\u003eGears are cut to provide the strongest teeth possible in any terrain\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1987 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferential Type:\u003c\/strong\u003e Limited Slip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Differential\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Differential\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\nAlso works with 3.73 \u0026amp; up thick gears.  We recommends the use of high grade Non-Synthetic GL-5 gear oil and Yukon LSD additive (or similar) for long life and smooth operation. The use of synthetic oil is not recommended and may result in aggressive or noisy operation.","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723031585006,"sku":"HUU-02-124","price":727.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/9364c94c4d0e2dffd3b71adfaa4e1aa36b61983d.jpg?v=1791647677"},{"product_id":"hurst-engineering-limited-slip-differential-gm-12-bolt-truck-3-73-gear-ratio-02-125","title":"Hurst Engineering Limited Slip Differential - GM 12-Bolt Truck,3.73+ Gear Ratio - 02-125","description":"Are you stuggling for traction, or just have some terrible noise coming from the GM 12-bolt in your truck?  Hurst Engineering Limited Slip Differentials offer great traction and strength, but are not overly aggressive for the street. These differentials are 4-spring, composite, clutch-style, limited-slip carriers-with internal gears machined from forged 4320 steel and stronger teeth.  These differentials are for GM 12-bolt 30 spline rear ends, and are compatible with 3.73-UP ring \u0026amp; pinion gears. Get rid of that old open differential and upgrade to a limited slip unit!\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFits 3.73 Gear Ratio \u0026amp; Up\u003c\/li\u003e\n\u003cli\u003eFits 12T GM with 30 Spline Axles\u003c\/li\u003e\n\u003cli\u003eComposite Clutches for great driveability\u003c\/li\u003e\n\u003cli\u003eFeature 4320 chromoly spider gears for ultimate durability\u003c\/li\u003e\n\u003cli\u003eGears are cut to provide the strongest teeth possible in any terrain\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1987 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferential Type:\u003c\/strong\u003e Limited Slip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Differential\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Differential\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\nWe recommends the use of high grade Non-Synthetic GL-5 gear oil and Yukon LSD additive (or similar) for long life and smooth operation. The use of synthetic oil is not recommended and may result in aggressive or noisy operation.","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723032338670,"sku":"HUU-02-125","price":699.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/07892cc9fce9fc660184e094cd5e93b30482b074.jpg?v=1791647678"},{"product_id":"hurst-engineering-ring-pinion-for-gm-12-bolt-truck-3-08-ratio-02-126","title":"Hurst Engineering Ring \u0026 Pinion for GM 12-Bolt Truck 3.08 Ratio - 02-126","description":"Everyone has different needs for their truck.  One of the most dramatic changes you can make to a vehicle are the rear ring and pinion gears.  Whether you are going for aggressive low end response for performance and towing, you're looking to make your truck a highway cruiser, or you have made a change to your wheel and tire size, we have a ring \u0026amp; pinion for you.  Hurst engineering offers gear sets ranging from 3.08 to 4.56 for the GM 12-bolt rear ends to get you exactly where you need to be.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3.08 ratio\u003c\/li\u003e\n\u003cli\u003eFits GM 12-Bolt differentials\u003c\/li\u003e\n\u003cli\u003eGear tooth finish reduces friction and heat for longevity\u003c\/li\u003e\n\u003cli\u003eHigh grade steel for strength and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1987 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 3.08\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Differential Ring and Pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Differential\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723032961262,"sku":"HUU-02-126","price":415.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/2c7b2cec5b738f0c6c993195ad4116806a6d9b5f.jpg?v=1791647679"},{"product_id":"hurst-engineering-ring-pinion-for-gm-12-bolt-truck-3-42-ratio-02-127","title":"Hurst Engineering Ring \u0026 Pinion for GM 12-Bolt Truck 3.42 Ratio - 02-127","description":"Everyone has different needs for their truck.  One of the most dramatic changes you can make to a vehicle are the rear ring and pinion gears.  Whether you are going for aggressive low end response for performance and towing, you're looking to make your truck a highway cruiser, or you have made a change to your wheel and tire size, we have a ring \u0026amp; pinion for you.  Hurst engineering offers gear sets ranging from 3.08 to 4.56 for the GM 12-bolt rear ends to get you exactly where you need to be.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3.42 ratio\u003c\/li\u003e\n\u003cli\u003eFits GM 12-Bolt differentials\u003c\/li\u003e\n\u003cli\u003eGear tooth finish reduces friction and heat for longevity\u003c\/li\u003e\n\u003cli\u003eHigh grade steel for strength and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1987 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 3.42\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Differential Ring and Pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ring \u0026amp; Pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723033551086,"sku":"HUU-02-127","price":415.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/b45012d0ba06410b4dd7a3f55f71e29934ba13b2.jpg?v=1791647681"},{"product_id":"hurst-engineering-ring-pinion-for-gm-12-bolt-truck-3-73-ratio-02-128","title":"Hurst Engineering Ring \u0026 Pinion for GM 12-Bolt Truck 3.73 Ratio - 02-128","description":"Everyone has different needs for their truck.  One of the most dramatic changes you can make to a vehicle are the rear ring and pinion gears.  Whether you are going for aggressive low end response for performance and towing, you're looking to make your truck a highway cruiser, or you have made a change to your wheel and tire size, we have a ring \u0026amp; pinion for you.  Hurst engineering offers gear sets ranging from 3.08 to 4.56 for the GM 12-bolt rear ends to get you exactly where you need to be.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3.73 ratio\u003c\/li\u003e\n\u003cli\u003eFits GM 12-Bolt differentials\u003c\/li\u003e\n\u003cli\u003eGear tooth finish reduces friction and heat for longevity\u003c\/li\u003e\n\u003cli\u003eHigh grade steel for strength and durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Details:\u003c\/strong\u003e Compatible with 1963-1987 Chevy\/GMC C\/K Series Pickup \u0026amp; Blazer\/Jimmy\/Suburban\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGear Ratio:\u003c\/strong\u003e 3.73\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Differential Ring and Pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ring \u0026amp; Pinion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear Axle Type:\u003c\/strong\u003e GM 12-Bolt (12T)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Quantity:\u003c\/strong\u003e 30\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hurst Engineering","offers":[{"title":"Default Title","offer_id":49723034140910,"sku":"HUU-02-128","price":415.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/ac04f2149787b1d85ccaefb241569570b91cbf56.jpg?v=1791647682"}],"url":"https:\/\/elmosspeedshop.com\/collections\/hurst-engineering.oembed","provider":"Elmo's Speed Shop","version":"1.0","type":"link"}