Designed specifically for GM 4.8/5.3/6.0L cathedral port truck engines and cathedral port LS1, -2, -6 race applications where hood clearance is not a concern, the FAST LSXRT102mm Intake Manifold follows the path chartered by the original FAST LSX Gen III Intake by featuring a modular design that allows for easy porting and disassembly and a runner design that yields an incredible 25 peak horsepower gain over the stock intake, on a stock 6.0L engine with a Big Mouth 102mm Throttle Body. And similar to the LSXR 102mm Intake Manifold for cars, the LSXRT features the ability to remove individual runners for modification. The LSXRT is constructed from a proprietary precision injection molded polymer which offers many benefits, including lighter weight, greater strength and lower heat soak propensity. While it features a 102mm air inlet that was designed for the FAST Big Mouth 102mm Throttle Body, it can also be used with stock 90mm or aftermarket 92mm throttle bodies (78mm three-bolt throttle bodies require an adapter). Other features include integrated nitrous bungs and precise bolt-on fit that permits the use of factory accessories and OEM fuel/emission connections without adjustments or clearance issues. Some GM truck models may require the FASTÂ 92mm or 102mm throttle body.
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:
- 1,800-6,000
- Material:
- Polymer
- Finish:
- Black
- Height:
- N/A
- Intake Section Included:
- Complete
- Throttle Body Bore Size:
- 102mm
- Fuel Rails Included:
- No
- Aftermarket Fuel Rail Required:
- Yes
- Has Bosses:
- Yes
- Bosses Machined:
- Yes
- Boss Quantity:
- Eight
- Injectors Included:
- No
- Throttle Body Included:
- No
- EGR:
- No
- Quantity:
- Sold as a kit.
- Notes:
- Designed for use with Big Mouth 102mm throttle body but can also be used with stock 90mm or 92mm throttle bodies. 78mm three-bolt throttle bodies require an adapter. May require a taller hood.
- Make:
- Chevrolet
- Engine Family:
- Chevy small block Gen III/IV (LS-based engines)
- Engine Sizes:
- 4.8L/294-6.0L/364
- Years:
- 1997-2019
- Cylinder Head Style:
- Cathedral port
