FAST Intake Manifold Upper Shell

The FAST LSX intake manifold upper shell is constructed from a durable, space-age polymer plastic, designed as a multi-piece component for improved accessibility and porting capability. This advanced material construction makes it 30 percent stronger than the factory polymer unit and prevents it from becoming a heat-robbing sink, a common issue with aftermarket aluminum manifolds. This intake manifold is engineered to enhance performance, providing a claimed 20 horsepower increase on General Motors LS1 engines and 15 horsepower on Corvette LS6 engines. Crucially, these gains are achieved without any compromise in drivability or low-RPM torque. The design also features integrated nitrous oxide injector ports and accommodates throttle bodies larger than the stock 78mm size for increased fuel flow. This product is a special order item and typically requires 12-15 business days for shipping on average. The applications listed include the 2007, 2006, 2005, and 2004 Cadillac CTS-V (with 6.0L or 5.7L engines) and the 2004 Pontiac GTO (with a 5.7L engine), all RWD models.