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.
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.
- 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 ¾”-16 o-ring ports (8 AN)
Notes: 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.
Instructions
Emissions Warning
Products sold on this website may not be legal for use on public roads or highways due to Environmental Protection Agency (EPA) restrictions or California Air Resources Board (CARB) emissions regulations. Federal and State regulations may restrict Product installation to pre-emissions regulation (Model Year 1974 or earlier) or to competition/racing vehicles used exclusively in
1) events organized by recognized bodies, authorizing permits for participating drivers.
2) racing event qualification, and3) practice associated with events.
Installation of such products, including driving racing vehicles to and from the track, may be considered illegal “tampering ” or as “defeat device”, and may result in federal and state penalties. It is the purchaser’s responsibility to ensure compliance with all applicable emissions laws, including California’s stricter standards.
Proposition 65 Warning:
This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
- Engine Block Style:
- Stock/OEM standard deck
- Style:
- Multi-port
- Basic Operating RPM Range:
- 3,500-8,000
- Material:
- Aluminum
- Finish:
- Natural
- Height:
- 9.070 in.
- Intake Section Included:
- Complete
- Throttle Body Bore Size:
- 105mm
- Fuel Rails Included:
- Yes
- Aftermarket Fuel Rail Required:
- N/A
- Has Bosses:
- Yes
- Bosses Machined:
- Yes
- Boss Quantity:
- Eight
- Injectors Included:
- No
- Throttle Body Included:
- No
- EGR:
- No
- Quantity:
- Sold as a kit.
- Make:
- Chevrolet
- Engine Family:
- Chevy small block Gen III/IV (LS-based engines)
- Engine Sizes:
- 4.8L/294-6.0L/364
- Years:
- 1997-2017
- Cylinder Head Style:
- Cathedral port
