Holley Mid-Rise EFI Intake Manifold & Rail Kit, LS1

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

Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219
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
EFI Fuel Rail Kit included