ARP Main Bolt Kit - W10/W11 for Gen 1 MINI

Strengthen your bottom end with the ARP Main Stud Kit, engineered for the MINI R50, R52 and R53 W10 and W11 1.6L naturally aspirated and supercharged engine found in the Cooper S, JCW, and GP. Ideal for high-performance builds, this kit replaces the factory main bolts with high-strength 8740 chromoly steel studs, offering superior clamping force and improved block stability.

Designed to handle the increased stresses of high RPM, forced induction, and track use, ARP studs help maintain precise main bearing alignment and reduce the risk of cap walk or crankshaft movement under load.

Key Features:

• Fits MINI R50 W10 (One and Cooper) and R53 W11 engine (Cooper S, JCW, GP)

• Made from premium 8740 chromoly steel

• Superior clamping force and fatigue strength

• Improves block rigidity and bearing alignment

• Ideal for high-performance, forged, and track builds