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Holley LS EFI Manifold - 2x4 Dual Plane GM LS1/LS2/LS6

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

Part # 300-121 Be the first to write a review

Holley LS EFI Manifold - 2x4 Dual Plane GM LS1/LS2/LS6

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4

Emissions

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

    See Emissions Details
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.

About Holley EFI

Find standalone EFI for LS, Coyote, Hemi and more at Holley.com. From engine swapping to managing up to 4000 horsepower, we have a solution for every project!

Brand Holley EFI
Clearance CategoryAir and Fuel Delivery
ColorSilver
ConstructionCast
Discount PercentageOver 75%
Emission Code4
EngineGM LS1/LS2/LS6
FinishSilver
Flange Style4150 Square Bore
Front Height4.47 inch
Fuel System TypeEFI
Manifold TypeDual Plane
Product TypeIntake Manifold
Rear Height5.54 inch
RPM Power Band1500-6500 RPM
Sale CategoryAir and Fuel Delivery
WarrantyLimited 90 Day
UPC090127671078
Part Number300-121
4

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition 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

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).
Limited 90 Day: See Details
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