PRW 1834610 Xtreme Duty SFI-Rated Internal Balance 168 Teeth Steel Flexplate for GM LS1, LS2, and LS6 1997-Present Engineered to handle extreme duty applications Designed to take the punishment of todays high horsepower engines 4mm thick centerplate provides a solid foundation Ring gears are precision welded to meet SFI specifications, utilizing robotic machinery and cold-welding process