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 TIP: For the N55 Engine Block, you 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- Three Steps w/ ARP Lube As Follows: ARP2000 - 30 / 60 / 90 Ft-Lbs. CA 625+ - 30 / 70 / 110 Ft-Lbs.

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

***This is NOT the Chrysler and Volvo stud kits! VAC Motorsports and ARP engineers designed and assembled this kit with high grade material, specifically so N55/S55 owners have a PROPER kit that does not fail over time, such as the retro-fit Chrysler and Volvo head stud kits. 

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 VAC 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