The PERRIN shifter stop upgrade for 2015–2025 Subaru WRX with the STI short-throw shifter is an add-on that requires the core shifter stop kit. Tailored to STI-style short-throw linkages, it restricts excess travel to deliver a crisper, more defined gear change when paired with the main stop kit. The upgrade is intended for WRX owners using the STI short-throw assembly seeking a firmer shift feel.
PERRIN 15-26 Subaru WRX (w/STI Short Throw) Shifter Stop Upgrade (Req. Shifter Stop Kit)