When I bought my Tacoma over 2 yrs ago, it was already built. Said it had a Centerforce clutch in it and that it had been in there for a couple years then. It has a stock t case in it, 36" Swampers, and the 3RZ 4 cyl engine, so I have to ride the clutch alot when I crawl.....and it is still in great shape. I have no proof that it is a centerforce, but whatever it is, has done an exceptional job over the years holding up to a beating.