FAST LSX 102MM Intake Manifold Fits: GM LS7 Rectangular Port 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 LS7 engine with a Big Mouth 102mm Throttle Body produced gains of 16+ horsepower, and 26+ rear wheel horsepower on a 500c.i. engine. The LSX 102mm Intake Manifold features a modular design that allows 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, the LSX offers a host of benefits over aluminum aftermarket intakes, including lighter weight, increased strength and improved heat dissipating characteristics. While the LSX features a 102mm air inlet that is perfectly suited to the FAST Big Mouth 102mm Throttle Body, 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 concerns. Fits C5 and C6 Corvettes without modification.