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Subaru WRX STI (2015–2021) Clutch & Drivetrain FAQ's

Please read our FAQs page to find out more.

When is it time to upgrade the clutch on my 2015–2021 WRX STI?

If you notice slip in higher gears after tuning or hard launches, it’s time. Pair a higher‑torque clutch with a quality flywheel and fresh release components.

Do stiffer engine or transmission mounts help the STI shift more precisely?

Yes—firmer mounts and shifter bushings limit drivetrain movement, improving shift feel and reducing wheel hop under aggressive launches.

How does the STI’s DCCD benefit from drivetrain upgrades?

With better bushings and mounts, the DCCD can deliver torque more consistently, improving corner exit grip and feedback on track.