Noticeably improved engine response and acceleration, OE to mild gear rattle; Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life; One piece construction allows less opportunity for failure and provides uniform efficient heat transfer from the clutch disc. No more warped inserts or loose ring gears; Recommended for street and race use; Forged, CNC machined and dynamically computer balanced for smooth high RPM reliability
This Part Fits:
| Year | Make | Model | Submodel | 
| 2004-2014 | Subaru | Impreza | WRX STI | 
| 2007,2011-2014 | Subaru | Impreza | WRX STI Limited | 
| 2010 | Subaru | Impreza | WRX STI Special Edition | 
| 2007-2009 | Subaru | Legacy | GT spec.B | 
| 2015-2021 | Subaru | WRX STI | Base | 
| 2015 | Subaru | WRX STI | Launch Edition | 
| 2015-2021 | Subaru | WRX STI | Limited | 
| 2019 | Subaru | WRX STI | S209 | 
| 2016 | Subaru | WRX STI | Series.HyperBlue | 
| 2018 | Subaru | WRX STI | Type RA |