FAST® engineers teamed up with airflow specialists at RHS® to develop polymer intake manifolds for rectangular port GM LS3 and LS7 engines and cathedral port LS1/LS2/LS6 engines. Testing on a near stock 500c.i. LS7 engine with a Big Mouth 102mm Throttle Body™ produced gains of 16+ horsepower and 26+ rear wheel horsepower. The LSXR™ 102mm Intake Manifold features a revolutionary modular design that allows for fast and easy disassembly and features the ability to remove individual runners for porting.

Constructed from the same advanced polymer material as the original FAST® LSX™ 92mm Intake Manifold, but now in the popular black color, the LSXR™ offers a host of benefits over aluminum aftermarket intakes, including lighter weight, increased strength and improved heat dissipating characteristics. While the LSXR™ features a 102mm air inlet that is perfectly suited to the FAST® Big Mouth 102mm Throttle Body™, for maximum convenience it can also be used with OEM or aftermarket 90mm or 92mm throttle bodies. Other features include integrated nitrous bungs and perfect bolt-on fitment that allows the use of factory accessories without modification or clearance.