Holley Performance 300-137 Engine Intake Manifold

Compatible with GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads.; Single Plane EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads.;

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