ARP HEAD STUD KIT, BMW N55/S55

• (14) 11mm ARP Head Studs

• (14) ARP Washers for 11mm Stud

• (14) ARP Nuts for 11mm Studs

Install tips: MUST Drill and Tap the (4) 9mm holes in the engine block to make them 11mm holes. This way all the engine block holes are 11mm, and fit ALL (14) 11mm Studs.

Torque Specs: All studs torque down through 3-equal steps to 95 ft lbs

*S55 option features:

• (14) 11mm ARP Head Studs

• (14) ARP Washers for 11mm Stud

• (14) ARP Nuts for 11mm Studs

Install Tips: Entirely Bolt-On kit, NO modification necessary, threads right up as factory stud replacement!

Torque Specs: All studs torque down through 3-equal steps to 95 ft lbs

ARP is the world leader in fastener technology. Makers of the finest fasteners in the market, especially for BMW engines, ARP is the brand you can count on when you want the highest reliability possible. If you are looking for high performance from your BMW engine, then ARP Head Stud Kits are a must. All kits come complete with hardened parallel-ground washers and aerospace-quality nuts. 

ARP is used on ALL our built engines.

• Protects the threads in your N55/S55 engine block.

• Significantly stronger than other stud kits

• Trusted around the world by top race teams