im not sure if this is a bit of info that everyone but me knows but if u didnt know the throw out bearing for the spec clutches is comparable to the 90 to 96 300zx na. everyone else i called and asked about what i could use instead of buying a new spec bearing because i needed it asap told me that a 95 to 98 ka bearing would work but i ordered one and it was smaller in diameter and also in thickness. so if anyone cares or needed to know well then now u know i hope this can help someone.