LT1 Throttle Body Air Foil
Among popular aftermarket performance modifications for the TPI engines used in the third generation Camaro as well as the LT1 engine used in the 1993-1997 Camaro and Firebird, perhaps none has been as controversial as the infamous throttle body air foil. This piece, originally pioneered by TPIS (Tuned Port Injection Specialties), seeks to increase torque and horsepower by smoothing airflow into the dual entrance ports of the OEM throttle body. While this modification is/was very simple to install and relatively inexpensive (under $100), many owners felt (and continue to feel) that the performance gain is neglible to non-existent, while other owners continue to believe in the modification and feel that it is worth the comparatively small expense, even if power gains are minimal.
Today, this modification continues to be sold by multiple companies.
Without air foil:
http://www.wolfeden.org/firehawk/images/airfoil-before.jpg
With air foil installed:
