2015-2021 Subaru WRX/STI Pitch Stop Mount by KartboyKartboy Pitch Stop Mount Fitment: 2015 2021 Subaru WRX STI Part #: KB 015 Pitch Overview The Kartboy Pitch Stop Mount is a high performance aluminum upgrade designed specifically for Subaru WRX and STI models from 2015 to 2021. This component replaces the factory engine pitch stop mount, providing a more rigid and durable connection between the engine and chassis. Its primary purpose is to reduce engine movement during acceleration, deceleration, and