i glazed up 2 excedy brass button clutches, both in my old 33 gtst. had one in my gtr before the motor blew, so they all were a bitch to drive. i.e ur not suppose to ride them as they'll glaze over, i only learned on the 3rd time
and once they start to slip, theyre gooone within a very short period
jim's clutch packs arent a true brass button material, theyre carbotic, a mixture of differnt types