ARP Main Stud Kit BMW M20, M50, S50, M52
BMW 2.5L (M50), 2.8L (M52) & 3.2L (S52US)
Socket Size: 12mm 12pt, 4mm Allen
Thread: M10x1.5
Tightening torque: Tighten in 3 steps
Step 1: 20 ft/lbs or 27.1nm
Step 2: 40 ft/lbs or 54.2nm
Step 3: 60 ft/lbs or 81.3nm
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