Holley Single Plane EFI LS1 Intake Manifold

Holley Single Plane EFI LS1 Intake Manifold Part #: 300-137 Single Plane EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads. Features: 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 Weight: 17 lb. Length: 23 in. Width: 14 in. Height: 7 in. Brand: Holley EFI Construction: Cast Emission Code: 3 Engine: GM LS1/LS2/LS6 Finish: Satin Flange Style: 4150 Square Bore Front Height: 5.417 in. Fuel System Type: EFI Manifold Type: Single Plane Rear Height: 5.417 in. RPM Power Band: 2500-7000 In Store Pickup: Anaheim, CA, USA   Return Policy