top of page
FAST LSXR Intake Manifold Cathedral Port LS1/LS2/LS6

FAST LSXR Intake Manifold Cathedral Port LS1/LS2/LS6

SKU: FST-146302B

The engineers at FAST teamed up with the airflow specialists at RHS to develop a 3-piece, polymer intake manifold. They are constructed from a proprietary advanced polymer material that offers a host of benefits over aluminum aftermarket intakes, including lighter weight and improved strength and heat dissipating characteristics. While they feature a 102mm air inlet that is perfectly suited to the FAST Big Mouth 102mm throttle body, they can also be used with stock or aftermarket 90mm or 92mm throttle bodies. Other features include integrated nitrous bungs and perfect bolt-on fitment that allows for the use of factory accessories without modifications or clearance concerns. FAST LSXR intake manifolds' 3-piece modular design allows for easy disassembly and porting. This new design gives you the ability to remove individual runners from the manifold for modification.


Cylinder Head Configuration: Cathedral Port LS1/LS2/LS6

Fuel Injection Style: Multi-port

Basic Operating RPM Range: 1,800-6,000

Intake Section Included: Complete

Throttle Body Bore Size: 102mm

Engine Block Deck Height: Standard deck

Injectors Included: No

Multi-Port Fuel Rails Included: No

Aftermarket Fuel Rail Required: No

Throttle Body Included: No

Runners Included:Yes

Runners Removable: Yes

Plenum Material: Plastic

Plenum Finish: Black

Base Material: Plastic

Base Color: Black


This is a 3-piece unit designed for the big mouth 102 mm throttle body or a stock throttle body with adapter. For cathedral port heads. Gaskets not included.