Throttle Body Shaft Seals for 1G/2G DSM, Evo 8/9, and 3000GT/Stealth - Dyno-Proven Boost Leak Fix

These high-grade throttle body shaft seals are a direct replacement for worn OEM seals on Mitsubishi DSM, Evolution, and 3000GT platforms, engineered to eliminate boost leaks that rob power and cause throttle plate sticking or jamming. Ideal for DSM and Evo owners troubleshooting unexplained power loss, rough idle, or a sticky throttle pedal, whether the car is a daily driver, a track build, or a boosted street machine being tuned for maximum output. Sold as a pair, these seals restore a proper airtight seal at the throttle shaft, stopping the boost leaks that degrade turbo response and throttle feel. STM dyno-tested this exact repair on their in-house dyno and recovered 20 wheel horsepower and 20 ft-lbs of torque simply by replacing the leaking seals, a measurable, documented gain with no other changes. Optional OEM throttle body gaskets are available at checkout for a complete reseal in a single order. Fitment covers 1991-1994 1G DSM, 1995-1999 2G DSM, 2003-2006 Evolution VIII-IX, and 1991-1999 3000GT and Stealth, but does not fit 1990 DSM. Unlike generic seal kits sold without fitment verification or dyno data, this is a tested, platform-specific solution backed by real measured results from STM's own shop.