You will increase airflow and performance of you GM vehicle with one of these BBK throttle bodies. You will get better throttle response as well. BBK starts with precision 356 aluminum alloy castings which is machined on BBK's ultra-modern CNC machines to exact tolerances. Each unit is then hand assembled with high quality BBK components such as o ringed shaft, double sealed roller bearings, precision die stamped linkage assemblies along with factory quality fittings and connectors to ensure a perfect installation. Applications: 1987-1988 Pontiac Firebird 5.7L (350) and 5.0L (305) 1987-1988 Pontiac Trans Am 5.7L (350) 1987-1988 Chevy Camaro 5.7L (350) 1985-1988 Pontiac Firebird 5.7L (350) and 5.0L (305) 1985-1988 Chevy Corvette 5.7L (350)