Made from space-age polymer composite material, these FAST LSX multi-piece component intake manifolds show a 20 hp increase on LS1 engines and a 15 hp increase on the LS6 engine, with no loss of drivability or low-rpm torque. Best of all, the FAST space-age composite material polymer intake is 30 percent stronger than the stock polymer unit. Unlike aftermarket aluminum intakes, these intakes avoid becoming power-robbing heat sinks. These manifolds come with integrated nitrous-oxide injector ports and the ability to accept a larger-than-stock throttle body for increased fuel flow. In addition, the LSX manifolds can be ported, and are easily accessible as a result of the multi-piece design.