HOLLEY - SINGLE PLANE EFI INTAKE - GM LS1/LS2/LS6 - 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.

• 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