The Subaru Pitch Stop Mount is a great way to get more power to the ground by reducing transmission flex. The stock pitch stop mount is soft and allows the transmission to pitch up and down during driving. The Pitch Stop mount will reduce the amount of movement the transmission goes through especially when you go from hard acceleration to hard deceleration. The great thing the STI pitch stop mount will hold the transmission securely with out adding any harshness or noise. This pitch stop mount is very easy to install with simple hand tools.