ARP Main Stud Kit - E36, E39, Z3, M50, M52, S50US, S52

ARP main studs replace the M10 bolts used in BMW M50, S50, M52, and S52 engines.

The ARP Main Stud Kit offers great benefits and many reasons to be chosen over anything else in the market. ARP main studs eliminate main cap walk and fretting, and they offer the peace of mind of protecting the threads in your engine block. These premium studs are manufactured by ARP using only the best materials, processes, designs, and engineering. Every ARP main stud kit exceeds the most stringent aerospace specifications.

These main stud kits come complete with everything from the hardened parallel-ground washers to the aerospace-quality nuts you come to expect from ARP. Some applications have provisions for mounting windage trays and have specially designed standoff studs with serrated lock nuts to position the windage tray and lock it securely in place. 

The studs themselves are created from 8740 chrome moly steel, then are heat-treated in-house to 190,000 psi tensile strength, and finally precision J-form threads are rolled after heat-treatment to create a fastener that has threads 1000% stronger than others. 

Genuine ARP studs are the only choice if you demand the absolute best quality.

BMW Fitments:

3 Series
E36 (92-99) > 323ic
E36 (92-99) > 323is
E36 (92-99) > 325i
E36 (92-99) > 325ic
E36 (92-99) > 325is
E36 (92-99) > 328i
E36 (92-99) > 328ic
E36 (92-99) > 328is
E36 (92-99) > M3 (1995)
E36 (92-99) > M3 (96-99)
5 Series
E34 (89-95) > 525i M50
5 Series
E39 (97-03) > 528i 97-98
Z Series
E36/7 / E36/8 Z3 (96-02) > Z3 2.8 97-98
E36/7 / E36/8 Z3 (96-02) > Z3 M - S52