The ARP BMW E46 M3/S54 Main Stud Kit is designed to provide superior clamping force and superior fatigue strength for high performance engines. This kit is made from 8740 chromoly steel and is heat-treated for extra strength and durability. The kit includes 10 studs, 10 nuts, 10 washers, and 10 copper sealing washers. This kit is designed to provide a secure and reliable connection between the cylinder head and the engine block and is ideal for high-performance applications.