What is an airfoil?

Simply put, all airfoils are designed with one objective in mind, better, improved airflow into the intake of the engine. With this comes the expectation of better throttle response and claimed horsepower gains. The Hypertech/TPIS style airfoil is the type that is held into the throttle body by a bolt and special nut that’s dropped from the top of the throttle body (removing the top plate.) The following instructions demonstrate how to install this type of airfoil on 305/350 TPI engines.

Installing your Hypertech/TPIS type airfoil.

Ensure you have all 3 pieces. The airfoil, bolt and special nut.