Hays 130 Tooth SFI 1.1 Flywheel 30 lb Internal Balance 6 Bolt Crank Mopar V8 11224 Heavy Detents For Positive Engagement Size:X Large Heavy Detents For Positive Engagement All MAHLE Motorsports pistons are dual or triple coated Drag racing's biggest stars have relied on Hays since SEMA Hall of Famer Bill Hays decided back in 1958 that there had to be a way to build one that could stand up to racing's unimaginable power and torque Drag racing's biggest stars have relied on Hays since SEMA Hall of Famer Bill Hays decided back in 1958 that there had to be a way to build a clutch that could stand up to racing's unimaginable power and torque