Specification Bore: 101.5mm • Comp .  Height : 1.416 " Pin Length : 2.500 " Pin Diameter : 1.024 " Forging : 100m Dome : 0.039 • Top Ring : 1.5mm • 2nd Ring : 1.5mm Oil Ring : 3.0mm • Weight : 531g • JE 0.073 Wire Locks Detailed description HPS  teamed up with JE pistons to develop high performance pistons to increase power and perform flawlessly under Xtreme heat and pressure JE Pistons is the leader in forged racing pistons • Specially Design for high horsepower • Forged 2618 Material used that is 100% approved and  certified that it can handle up to 1500 HP • Total Seal Premium rings are included • 9310 HD pin included it can handle up to 1500 HP • For upgrading piston Xtreme HD pin is also available it can handle up to 2500 HP •  Arrive ready to install Set of pistons with pins and lock NOTE: Images are for marketing purposes only, actual product may vary.