PERRIN PERFORMANCE PITCH STOP MOUNT: 1998–2008 SUBARU FORESTERPSP DRV 102BK Reduce drivetrain shudder under hard acceleration by installing a PERRIN Performance's Pitch Stop Mount. OEM pitch stops wear out and break, especially in Foresters with power and drivetrain upgrades. Prevent this with PERRIN's more aggressive option. The new PERRIN Pitch Stop Mount is designed exclusively for 1998 2008 Foresters! The PERRIN Performance Pitch Stop Mount controls the movement of the drivetrain in both on and off throttle