Torque Solution Shift Tight replaces the stock rear shifter mount bushings. While this product will not change the geometry of the shifting mechanism, it eliminates excessive play in the system for a more solid shift. This bushing is made from Limited Lifetime Warranty 75A durometer polyurethane. The same proven materials used for 10 years in the Subaru WRX / STI drivetrain is now available for the BRZ / FR-S!!!