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 technology of the LS pushrod engine is now mated with the im
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”
The LS engine architecture does not utilize an intake mounted water neck or distributor so it’s perfect for two Holley carburetors and this intake.
Specs
Brand
Holley EFI
Color
Aluminum
Construction
Cast
Emission Code
3
Engine
GM Small Block Gen III/IV (LS Based)
Finish
Satin
Flange Style
4150 Square Bore
Front Height
4.47 inch
Fuel System Type
EFI
Manifold Type
Dual Plane
Product Type
Manifold
Rear Height
5.54 inch
RPM Power Band
1500-7000
Warranty
Limited 90 Day
Part Number
300-121
Emissions
3
This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.
The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
1965 and older U.S. manufactured California Certified vehicles
1967 and older U.S. manufactured Federally Certified vehicles
1967 and older Foreign manufactured vehicle
The following vehicles are considered Racing Use Only Vehicles:
Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
The following vehicles are considered Emissions Controlled Vehicles:
1966 and newer U.S. manufactured California Certified vehicles
1968 and newer U.S. manufactured Federally Certified vehicles
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).