CP Pistons brand 1999 - 2006 Harley Twin Cam 88ci forged piston kit. For use in street; high performance and racing engines; for use with a 3.750 in. standard bore size and stock stroke of 4.000 in. 9.75-1 compression; kit includes 1 piston; 1 piston pin; piston rings and pin lock rings. Order a quantity of 2 for complete engine rebuild.