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Holley LS EFI Manifold - 2x4 Mid-Rise Dual Plane

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

PART# 300-121

Suggested Retail: $475.95
Your Price:$427.95
Free Shipping on orders over $100*
  • 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. The LS engine architecture does not utilize an intake mounted water neck or \distributor so it’s perfect for two Holley carburetors and this inta
  • 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”
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Holley EFI 2x4 Mid Rise Dual Plane Intake Manifold, LS Gen 3 LS1/LS2/LS6 engines
BrandHolley
Emission Code3
EngineGM LS1/LS2/LS6
FinishSatin
Fuel System TypeEFI
Manifold TypeMid Rise
Product TypeManifold
RPM Power Band1500-7000
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).

This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing 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

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

*Free Shipping & Handling only offered to the continental US on orders over $100.