Holley LS EFI Manifold - 2x4 Dual Plane 300-121

• 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.

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).