Overview The Holley LS1/2/6 Lo-Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) cylinder heads. These intake manifolds will work with OE or aftermarket cylinder heads. The Lo-Ram intake manifolds are designed for forced induction (supercharged or turbocharged) engine applications and the 105 mm throttle body part number 112-581 or similar models. The base intake manifold is designed with a low height to aid the packaging of a plenum-mounted air-to-water intercooler in a top-feed configuration.
The 300-620 plenum entry configuration is designed to allow the included Hi-Ram 105 mm plenum top to be fitted to a low-profile base intake manifold. The short runner, low-profile base intake manifold intended for forced induction applications was conceived to package with an air to water plenum mounted intercooler with a shorter overall height than possible with other existing intake manifolds.
The fuel rail kits come with two sets of brackets. A set for long (usually standard length) fuel injectors and a
set for short (such as Pico, or LS7) fuel injectors.
Lo-Ram Base Intake Manifold Plenum Top Mounting Flange Height - 5.17"
Total Height:
Plenum Configuration w/105mm Long. Mount EFI Plenum Top - 9.07" (without an intercooler installed)
Plenum Configuration w/105mm Long. Mount EFI Plenum Top, w/an intercooler installed - 9.07"+ the intercooler thickness
Features:
Designed for GM LS Gen III and IV engines equipped with GM LS1/2/6 (cathedral port) cylinder heads
Designed for forced induction (supercharged or turbocharged) engine applications with peak power at 7000-8000 rpm depending on the application. With forced-induction and the short runner length the engine rpm at which peak power occurs is more likely to
Modular design allowing the use of the included plenum entry
Low height to aid the packaging of a plenum mounted air-to-water intercooler in a top-feed configuration or to fit under a stock or mildly modified hood in the front-feed configuration
High volume fuel rails and mounting hardware included with ?????-16 o-ring ports (8 AN)
