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:
Approximately 2500-7000 RPM power band
Standard Holley 4150 square bore flange
Optimized runner layout and constant cross sectional area

Provides a 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

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