ARP Head Stud Kit, BMW M50 M52 S50 S52 11mm Oversized

This ARP oversized 11mm head stud kit is designed to replace the 10mm head studs in M50/M52/S50/S52 engines for those who want to push the limits of their high horsepower turbo engines.

However, it's a MUST to have the block drilled and tapped professionally prior to installation.

These head studs are a great choice for increasing boost levels without the cylinder head lifting.

While both the 11mm L19 and 10mm Custom Age 625+ head studs are high-quality options made to ARP standards, we recommend the 10mm 625+ option.

However, the choice ultimately comes down to personal preference.

It's essential to note that precision machining is required when drilling and tapping to prevent thread holes from cranking, which could cause surface damage to the engine block and potentially lead to engine failure.