I had a spec 3 and spec flywheel. Had roughly 7500 miles on it, grabbed awesome, never slipped; even at 400hp.
When my motor took a poop I pulled it, when I got to the clutch had alot of hot spots(clutch kicking??) got to the disc and every rivet was wallowed out. I've heard of plenty of the same issue and what not.
I now have a exedy twin disc, but not in the car yet (undergoing 2j swap.)
More just giving my review on the spec D setup.
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