These JR Race Car Piston with rings range from 3.264″ all the way up to 3.740″. All pistons come with wrist pin (.590), wrist pin clips, proper ring set and instructions. Compression height is .625. In most cases these pistons need to be decked off to fit properly in your motor, however we can deck piston off if you give us a measurement. Please choose size piston for you application.