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Use for 3 inch exhaust systems with 2-bolt flange connections
A failed boost control solenoid will generally result in low boost pressures
Additional benefits include: balanced compression and rebound damping
STI has re-engineered gear shifting performance for sport driving
1st Driven Gear TY856 6MT Ratio 3.636 Application:STI MY08-21 6MT Use for 3 inch exhaust1st driven gear for 6 speed manual transmissions with trans ID codes starting with "TY856". Order based on specific application. Optional REM ISF (superfinishing) treatment. ISF is a precisely controlled treatment that reduces surface roughness left from the machining processes thereby improving reliability, reducing friction, and all but eliminating break in requirements and the resulting swarf. Ideally, we recommend treating both contacting gears
