Flow Booster, 1985-97 TPI/LT1 Throttle Body Camaro/Firebird Air Foil SLP's throttle body flow booster improves air flow at the entrance of your throttle body by 30 CFM. This airfoil shaped piece smoothes and directs airflow into the throttle body and makes up to 7 additional horsepower. The flow booster is manufactured from aircraft-quality, cast aluminum and includes all installation hardware and instructions for easy bolt-on installation. For maximum benefit, add an SLP cold air package.