Holley EFI - Holley LS EFI Manifold - 2x4 Dual Plane - Black GM LS1/LS2/LS6 300-121BK

Holley EFI 2x4 Dual Plane Intake Manifold, LS Gen 3 LS1/LS2/LS6 engines

Features:

• The Holley GM LS1/LS2/LS6 2x4V dual-plane was designed in the tradition of the great dual Holley 4160 induction systems that competed on drag strips, in Trans-Am and at Lemans in the 1960’s.
• The dual-plane equal-distribution layout produces great mid-range torque without compromising top end power.
• Carbureted and EFI versions available
• Power band from 1500-7000 rpm
• Appropriate for any street/performance, muscle car, or street rod enthusiast
• Cast aluminum construction
• Intended for use on all GM LS Gen III engines equipped with LS1/LS2 style cathedral port cylinder heads
• Carb Flange Center-To-Center: 8-5/8”

Specs:

• Basic Operating RPM Range: 1500-6500 RPM
• Brand: Holley EFI
• Carburetor Flange: Square/4150
• Category: Engine
• Color: Black
• Construction: Cast
• EGR Port: No
• Emission Code: 4
• Engine: GM LS1/LS2/LS6
• Finish: Black
• Flange Style: 4150 Square Bore
• Front Height: 4.47 inch
• Front Maximum Height: 4.47 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: Dual Plane
• Material: Aluminum
• Nitrous Bung(s) Included: No
• Part Type: Engine Intake Manifold
• Plenum Finish: Black
• Product Type: Intake Manifold
• Rear Height: 5.54 inch
• Rear Maximum Height: 5.54 IN
• Removable Runners: No
• RPM Power Band: 1500-6500 RPM
• Single Or Dual Plane Type: Dual Plane
• Sub Category: Cylinder Block Components
• Throttle Body Included: No
• Warranty: Limited 90 Day

Tech Resources:

All GM LS Gen 3 engines equipped with LS1/LS2 style cathedral port cylinder heads.



NOTE: The EFI versions of the LS HI-Ram intake manifold and fuel rail are designed to accept Bosch Style EV-1 or Magneti Marelli Pico fuel injectors. OE LS fuel injectors may not fit properly in the Hi-Ram EFI intake manifold fuel rail assembly. There is a kit available separately for the LS7 Hi-Ram EFI to allow the use of stock LS7 fuel injectors, P/N 300-230 (see below in the service parts section).

Instructions - 199r10577rev3.pdf