Holley EFI Holley Single Plane EFI Intake - GM LS1/LS2/LS6 - 300-137

Features:

• Cast aluminum construction - great manifold for centrifugal blower, turbocharged or NOS power adder applications
• Optimized runner layout and constant cross sectional area - broad torque curve, best vehicle performance from 2500-7000 RPM
• Weight - 11.5 lbs.
• Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219
• 4150 Square bore flange
• 2500-7000 RPM power band
• Efficient casting design - lightweight, consistent wall thicknesses, improved casting quality
• Minimum carb flange height - fit in vehicles with minimum hood modifications
• Height (front) - 5.417" to the lifter valley cover flange at the engine block front flange
• Includes Viton® O-ring intake to cylinder head gaskets - Viton® is a registered trademark of DuPont Performance Elastomers
• Port size - 2.50" height x 1.15" wide

Product Specifications:

• Product Details: Single Plane EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads.
• Basic Operating RPM Range: 2500-7000 RPM
• Carburetor Flange: Square/4150
• Carburetor Quantity: 1
• Carburetor Studs Included: No
• CNC Ported: No
• Color: Silver
• Construction: Cast
• Cylinder Head Port Shape: Cathedral
• Deck Height: 9.24 IN
• EGR Port: No
• Engine: GM LS1/LS2/LS6
• Flange Style: 4150 Square Bore
• Front Maximum Height: 5.417 IN
• Fuel Injectors Included: No
• Fuel Rail(s) Included: No
• Fuel System Type: EFI
• Gasket Or Seal Included: Yes
• Grade Type: Performance
• Intake Port Gasket(s) Included: No
• Manifold Type: Single Plane
• Material: Aluminum
• Nitrous Bung(s) Included: No
• Part Type: Engine Intake Manifold
• Plenum Finish: Natural
• Product Type: Intake Manifold
• Rear Maximum Height: 5.417 IN
• Recommended Use: Forced Induction
• Removable Runners: No
• Removable Top/Lid: No
• Single Or Dual Plane Type: Single Plane
• Throttle Body Bore Diameter: 3.6 IN
• Throttle Body Gasket Included: No
• Throttle Body Included: No
• Vacuum Ports: Yes

Installation Notes:

Includes mounting bolts & washers. Also includes O-ring cylinder head mounting flange gaskets for an OEM style seal. Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219. NOTE: The EFI versions of the LS HI-Ram intake manifold and fuel rail are designed to accept Bosch Style EV-1 or Magneti Marelli Pico fuel injectors. OE LS fuel injectors may not fit properly in the Hi-Ram EFI intake manifold fuel rail assembly. There is a kit available separately for the LS7 Hi-Ram EFI to allow the use of stock LS7 fuel injectors, P/N 300-230 (see below in the service parts section).