I currently have a twin disc act and the De-acceleration chatter sucks and it's really grabby and stalls. I heard that an exedy hyper twin and ACT mod twin hd street are better due to organic materials and kevlar.

 

my ACT XD twin was fine and quiet. i found a rivet and some other parts that came off but its still fine. i'm planning to replace it with the same clutch and hoping to rebuild that for my backup. If your bellhousing has the plug removed then maybe similar parts fell off already thats why youre having problems(?). not a bad idea to try exedy tho

 

I've always had great experience with exedy in just about every situation so can't go wrong there. I've also use some newer Clutch Masters "strapped twin discs" on new BMW stuff and they are great but i don't know if they make the "strapped" version for the EVO yet.