Perrin Pitch Stop Mount Home Depot debuts new Houston store near The Heights. Reduce drivetrain shudder under hard acceleration by installing a PERRIN Pitch Stop Mount. Subarus with power and drivetrain upgrades will need PERRIN's more aggressive option. What Does A Pitch Stop Mount Do? Under hard acceleration, the drivetrain is being twisted front to back from the front axle torque twist. To control this front to back twisting, Subaru created a pitch stop mount. The factory pitch stop is made of plastic with soft rubber bushings, allowing for a significant amount of movement under hard driving conditions, creating drivetrain slop and shudder. Why Do You Need It? The PERRIN Pitch Stop Mount controls the movement of the drivetrain in both on and off throttle driving giving the driver a more positive feel and literally putting more power to the wheels by eliminating lost energy. Construction The PERRIN Pitch Stop Mount's body is machined from 6061 billet aluminum and features a combination of 95a front and 70a rear durometer bushings. The bushings are as stiff as possible without introducing excessive NVH (noise, vibration & harshness). Features: Pitch Stop Body Material: Aluminum Bushing Material: Polyurethane Finish: Anodize Kit Includes: (1) PERRIN Pitch Stop Mount Body (2) Large bushings (2) Small bushings (2) Metal sleeves (1) Energy Suspension grease packet Warranty & Instructions Vehicle Fitment: 1994 2000 Subaru WRX 2001 2007 Subaru WRX 2008 2014 Subaru WRX 2015 2021 Subaru WRX 2022+ Subaru WRX 1994 2000 Subaru STI 2001 2007 Subaru STI 2008 2014 Subaru STI 2015 2021 Subaru STI 2004 2009 Subaru Liberty GT