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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
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Brand Holley EFI Color Silver Construction Cast Emission Code 3 Engine GM LS1/LS2/LS6 Finish Silver Flange Style 4150 Square Bore Front Height 5.417 inch Fuel System Type EFI Manifold Type Single Plane Product Type Intake Manifold Rear Height 5.417 inch Recommended Use Forced Induction RPM Power Band 2500-7000 RPM Warranty Limited 90 Day UPC 090127687758 Part Number 300-137
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