{"product_id":"holley-efi-holley-hi-ram-lower-manifold-gm-lt1-300-237","title":"Holley EFI Holley Hi-Ram Lower Manifold - GM LT1 - 300-237","description":"The new Holley EFI Hi-Ram intake provides the ultimate performance with the new GM direct injected Gen V 6.2L LT1 engine.  The modular design of this manifold allows easy disassembly for custom porting, multiple tops, or custom induction systems.  Each runner has a large radius where it meets the plenum, and optimized taper \u0026amp; cross-sectional area to perform in a wide variety of engine configurations.  The optional injector bosses on the intake runners allow increased performance potential by using additional injectors along with the factory direct injection.  When you look for the pinnacle of performance, price, and quality, look to Holley EFI.\n\u003ch3\u003eFeatures:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHeight at Plenum Flange: 9.44”\u003c\/li\u003e\n\u003cli\u003eModular Design w\/ Removable Top\u003c\/li\u003e\n\u003cli\u003eEasy Assembly w\/ Top Mounted Screws on Plenum Top (all except front 2 screws)\u003c\/li\u003e\n\u003cli\u003eOverall Height: 13.34” (w\/ EFI Top - 95mm or 105mm) – See Drawing\u003c\/li\u003e\n\u003cli\u003eA-B Height: 12.10” (w\/ Carb Style Top - 2 x 4150 or 2 x 4500) – See Drawing\u003c\/li\u003e\n\u003cli\u003e3500-8000+ RPM Power Band\u003c\/li\u003e\n\u003cli\u003eIntakes w\/ Injector Ports Include Fuel Rails w\/ Dual Mounting (1.48” or 2.56” O-ring to O-ring injector length)\u003c\/li\u003e\n\u003cli\u003eHead Flange has Clearance for Fuel Supply to High Pressure Pump\u003c\/li\u003e\n\u003cli\u003eFuel Rails are Anodized, Laser Etched, and Machined for 8AN O-Ring Fittings at Each End\u003c\/li\u003e\n\u003cli\u003eO-Ring Seals at Cylinder Heads \u0026amp; Plenum Top\u003c\/li\u003e\n\u003cli\u003ePort Size: 2.06” High x 1.53” Wide\u003c\/li\u003e\n\u003cli\u003eRunner Length: Approx. 6.5”\u003c\/li\u003e\n\u003cli\u003eRear of Plenum Machined for MAP \u0026amp; 3 Vacuum Ports\u003c\/li\u003e\n\u003cli\u003eIncreased Runner Wall Thickness for Custom Porting at the Plenum to Runner Entry on Each Runner\u003c\/li\u003e\n\u003cli\u003eLarge Plenum Volume of 549 Cubic Inches (w\/ 1 x 95mm or 1 x 105mm Throttle Body Top)\u003c\/li\u003e\n\u003cli\u003eSeveral Top Options: 1 x 95mm, 1 x 105mm, 2 x 4150, 2 x 4500, or Blank Flange for Custom Throttle Bodies\u003c\/li\u003e\n\u003cli\u003eAvailable With or Without Injector Ports in the Runners\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 LT1 Hi-Ram, Lower Manifold Only w\/out Port EFI Provisions. Order Plenum Top Separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBasic Operating RPM Range:\u003c\/strong\u003e 3500-8000+ RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarburetor Flange:\u003c\/strong\u003e N\/A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarburetor Quantity:\u003c\/strong\u003e N\/A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarburetor Studs Included:\u003c\/strong\u003e N\/A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Ported:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Natural\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Cast\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Head Port Shape:\u003c\/strong\u003e Rectangle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeck Height:\u003c\/strong\u003e 9.24 IN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEGR Port:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e GM Gen V LT1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange Style:\u003c\/strong\u003e N\/A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Injectors Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Rail(s) Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Or Seal Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade Type:\u003c\/strong\u003e Performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Port Gasket(s) Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManifold Type:\u003c\/strong\u003e Hi-Ram\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrous Bung(s) Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Engine Intake Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlenum Finish:\u003c\/strong\u003e Natural\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Intake Manifold Base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable Runners:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable Top\/Lid:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Or Dual Plane Type:\u003c\/strong\u003e Single Plane\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrottle Body Bore Diameter:\u003c\/strong\u003e N\/A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrottle Body Gasket Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrottle Body Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType of Component:\u003c\/strong\u003e Lower Manifold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Ports:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes:\u003c\/h3\u003e\n\u003cp\u003eThe versions of the LT1 Hi-Ram intake manifold with port EFI provisions and fuel rails are designed to accept Bosch Style EV-1 or GM LS7 fuel injectors\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":49715191742702,"sku":"HLY-300-237","price":779.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/9110\/6798\/files\/f54c88b34b74ed0d9f6f1d7ec597c2c3766fcfac.jpg?v=1791571989","url":"https:\/\/elmosspeedshop.com\/products\/holley-efi-holley-hi-ram-lower-manifold-gm-lt1-300-237","provider":"Elmo's Speed Shop","version":"1.0","type":"link"}