S90 Billet Aluminum Throttle Body for Evo 4/5/6

The S90 direct bolt-on throttle body for Evo 4/5/6 is precision CNC machined from AL6061 T6 billet aluminum for increased durability. Available with a 70mm or 74mm bore size and includes a new gasket and mounting hardware.

Vehicle Fitment:
CN9A Evolution IV
CP9A Evolution V VI

More Info:
The throttle shaft and blade assembly are CNC machined from AL7075-T6 aluminum separately to increase horsepower and torque by optimizing airflow to the engine, with the addition of two high quality bearings for smoother and precision control.

Includes:
• Throttle Body
• Gasket
• Install Hardware

Install Notes:
• STM recommends a 3' coupler for the 70/74mm throttle bodies. The 3' coupler is just a bit loose on the 70mm, but a 2.75' is way too small. The 3' coupler is VERY tight on the 74mm, but it does fit. A 3.25' coupler on the 74mm is way too big.