6 stud girdle kit for Yamaha 701/760 and Yamaha 1100/1200 ADA billet heads. Includes 6 stainless studs, 6 stainless washers, and 6 chrome acorn nuts. This is a proper girdle system . It does not bolt the cylinder to the cases, but sandwiches the cylinder between the head and the cases. Therefore, there is no pressure on the base of the cylinder. These come in both normal length and extended length for your older cast stroker cylinders. All the threads have been rolled not cut for superior strength.