ACT Monoloc Collar 2002-2021 WRX / STI
Monoloc is a direct replacement and upgrades to the two-piece wedge collar in pull-type clutches for the Mitsubishi Evo, Subaru WRX, Subaru WRX STI, and Mazda RX-7. Its one-piece construction eliminates the collar snap ring from bending or popping out of place, which typically leads to clutch failure or severe pressure plate damage.
2002-2005 WRX 5-speed manual
2003-2015 Lancer Evolution