Metric Mechanic 6mm HD Valve Spring Retainer Set(24) For BMW M52/54, (US)S50/52

The Metric Mechanic 6mm Heavy Duty Steel Valve Spring Retainer replaces the (weak) factory retainer, part number is 11.34.1.703.218 or 11.34.1.432.453. We have seen the factory retainers pull through on numerous S50 and S52 (US E36 M3) engines. The factory valve retainer can result in catastrophic engine failure. Our retainer only weighs 2 grams more […]