hi
i was just woundering if any one knows the differance betwwen the s4 turbo clutch and the s5 turbo clutch, from what i can tell, is that oem microfich and aftermarket part number's are differant, but both have the same spec's 8 7/8-22 spline (or 23 spline depends who info u are using) and 15/16 hub !and i am also using a s4 turbo clutch in my 86 na car with a 89 t2 trans, and it seams to work fine but the part number thing and not knowing is driving me nutts!!!the only differance i can see is the 70.00 price jump on the s5 stuff!!

 

Have you seen this? It says that the s5 clutch is 235mm vs the s4's 240mm. They don't know why. I think the turbo clutches are interchangable between the s4 and s5.

http://www.mazdatrix.com/f86-92tb.htm