Holley EFI - Holley LS Hi-Ram EFI Manifold GM LS1/LS2/LS6 300-122

The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high flowing LS1/LS2/LS6 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. Aggressive, bold, race-bred styling will make bad intentions clear for drag race, muscle car, marine, off-road, sandrails, pulling trucks, track, street-rod applications and more!

• The base is designed to be modular in configuration to accept a wide range of carbureted and EFI tops and to be attractive to builders and fabricators as the foundation for custom induction systems.

• Runner length and the tapered cross-section designed to perform well for a wide range of engine configurations

• EFI fuel rails are machined for -8AN O-ring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi-Ram kits.

• Cast aluminum construction.

• Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range, max power at 7000-8000+RPM.

Features:

• Base Plenum Top Mounting Flange Height – 8.42” to the lifter valley cover flange on engine block.
• Total Height with 92/102mm EFI Plenum Top – 12.32” to the lifter valley cover flange on engine block.
• Port Size – 2.49” Height x 1.21” Wide
• Mounting Flange Gasket Type – Standard LS3 Molded O-Ring
• Plenum Top Gasket Type – 3/32” Round O-ring Cord
• Throttle Body Flange Location, with 92mm EFI Plenum Top : Height – 8.42” (from engine block lifter valley cover flange), Longitudinal Location – 3.84” (forward from engine block front flange), Angle – 25 deg. (down from vertical)
• Runner Length – 6.58”, As-Cast Runner Cross-Sectional Area – Tapered 4.25 in² to 2.53 in²

Specs:

• Basic Operating RPM Range: 3500-8000 RPM
• Brand: Holley EFI
• Category: Engine
• Color: Natural
• Construction: Cast
• EGR Port: No
• Emission Code: 4
• Engine: GM LS1/LS2/LS6
• Finish: Silver
• Flange Style: EFI
• Front Height: 12.32 inch
• Front Maximum Height: 12.32 IN
• Fuel Injectors Included: No
• Fuel Rail(s) Included: Yes
• Fuel System Type: EFI
• Gasket Or Seal Included: Yes
• Grade Type: Performance
• Intake Port Gasket(s) Included: No
• Manifold Type: Hi-Ram
• Material: Aluminum
• Nitrous Bung(s) Included: No
• Part Type: Engine Intake Manifold
• Plenum Finish: Natural
• Product Type: Intake Manifold
• Rear Height: 11.00 inch
• Rear Maximum Height: 11 IN
• Recommended Use: Forced Induction
• Removable Runners: No
• RPM Power Band: 3500-8000 RPM
• Single Or Dual Plane Type: Single Plane
• Sub Category: Cylinder Block Components
• Throttle Body Bore Diameter: 92 MM
• Throttle Body Included: No
• Warranty: Limited 90 Day

Tech Resources:

*** The front and rear height measurements listed in the Specs section are referencing the overall height with the top plate installed. Please see the diagrams in the product images for other dimensions.

Instructions - 199r10572rev6.pdf