This convenient kit includes all the hardware you need to replace your old, rusted (or broken?) exhaust manifold studs on your M50-family engine's head (including M50, M52, S50, S52). The perfect time to preventatively replace your exhaust studs is anytime you remove the manifolds (perhaps to install headers) or are removing the head or complete engine. Kit includes the correct number of OEM studs, copper locking nuts, and also includes two jam-nuts to be used for removing your old studs and installing the new studs. This stud and nut kit Fits 325i, 325is, 328i, 328is, 323is, E36 M3 (3.0 & 3.2 liter), E34 525i (91+), E39 528i, Z3 2.8.

This item fits the following BMWs:
1992-1998 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1991-1995 E34 BMW 525i
1997-1998 E39 BMW 528i
1997-1998 Z3 BMW Z3 2.8 M Roadster M Roadster