Subaru STI Replacement Triple Disc Middle Inverted Hub (4T-15031-C) by Comp1 Clutch he CCI triple disc provides the most economical racing clutch for the active sport compact enthusiast. Features 1 X 24T 0.105in Disc Material: Ceramic Disc Style: Rigid Hub Benefits Up to 300% increase at the wheels, depending on application Please Note: Image is for representation only, Actual item may vary. Applications 2004 – 2009 Subaru WRX STi What’s In The Box? 1 – Replacement clutch disc Warranty Comp1 Clutch Inc. (CCI) warrants covered items to be free from defects in material and workmanship for 90 days from the retail purchase from an authorized dealer.