Holley Hi-Ram Intake Manifold

This is a before and after of the Holley Hi Ram!

Holley GM LS1/2/6, LS3, and LS7 Hi-Ram Modular Intake Manifold Kits

The Holley LS Hi-Ram intake manifold series is designed for GM LS Gen III and IV engines. There is an LS Hi-Ram intake manifold available for each of the three GM OE LS cylinder head types, LS1/2/6 (cathedral port), LS3, and LS7. These intake manifolds will work with OE or aftermarket cylinder heads as long as the head is configured with the intake flange bolt pattern and intake port opening locations matching the appropriate OE application, LS1/2/6, LS3, or LS7.
These Hi-Ram style intake manifolds are designed for high performance engine applications up to 427-440 cubic inch displacement and maximum engine speeds of 7500-8500 rpm, depending on the engine combination. The Hi-Ram intake manifolds are intended for maximum performance applications and will not accept stock components and hardware. A modified hood will be required for most vehicle applications.
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).

EMISSIONS EQUIPMENT:
Holley Hi-Ram intake manifolds do not accept any emission-con