STM FIAV Bypass Plate.
- 1991-1999 1G & 2G DSM
The STM Fast Idle Air Valve Bypass Plate is cut from 1/8" aluminum and when sandwiched in the lower half of the throttle body, this blocks the unwanted FIAV passages, allowing you to retain a factory appearance and keep your ISC functional.
Does not work with 1990 DSM throttle bodies.
Don't forget the OEM O-Ring Seal for the FIAV.