STM Throttle Body Shaft Seals for DSM/Evo/3S Add Throttle Body Gasket:Add 91-94 1G DSM Gaskets The Large Knob is approximately

The Large Knob is approximately the same diameter as the OEM WRX/STI shift knob

550" @ 84 lbs Open: 1

and is CNC gun drilled to reduce weight

BMW M3 2015-2018 F80

STM-EVO46-UICP-AL-WB

STM Throttle Body Shaft Seals for DSM/Evo/3S Add Throttle Body Gasket:Add 91-94 1G DSM Gaskets The Large Knob is approximatelyWhen these seals wear out, they can cause leaks, sticking, and jamming of the throttle plate. We tested a car on our dyno at STM with leaky seals and when the seals were replaced, we picked up 20 whp and 20 ft pounds! Nasty boost leak! Sold as the pair of seals and OEM throttle body gaskets are available in the purchase menu. Vehicle Fitment: 1991 1994 1G DSM 1995 1999 2G DSM Evolution VIII IX 1991 1999 3000GT & Stealth * Does NOT fit 1990 DSM *