STM Throttle Body Shaft Seals for DSM/Evo/3S

STM Tuned Inc.



We price match!

When 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 *

Pair of Throttle Body Shaft Seals
(Optional) OEM Mitsubishi Throttle Body Gaskets

1G Notes:
These do not fit 1990 DSM. They have one side that uses a smaller seal.

2G Notes:
The OEM 2G throttle body gasket MD302262 has been discontinued, so we are unable to offer the full kit.
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Customer Reviews

Based on 28 reviews
Thomas Laurice (West Babylon, NY, US)
Great Replacement

STM Throttle Body Seals fixed my boost leak for my Evo IX perfectly. Quick & easy install. As always can’t go wrong with STM

Marc Mestre Olivella (Les Cabanyes, CT, ES)
Perfect body throttle seals replacement.

I bought another seals but this ones are the best. Fits perfect and with metal external part like the OEM ones. Looks like genuine and with long life durability.
Amazing fast shipping.

Josh Crumm (Spring Hill, KS, US)

STM Throttle Body Shaft Seals for DSM/Evo/3S

Derek Hunsicker (Portage, MI, US)

STM Throttle Body Shaft Seals for DSM/Evo/3S

Mike evo9 (Everett, WA, US)
Throttle body seals

STM always delivers, fast shipping and new seals fixed my boost leak.

Cancer and Reproductive Harm