PRW Flywheels are race ready and S.F.I approved. They have been precision balanced to exact tolerances and feature CNC Machined ring gears for superior wear resistance against the worst of racing racing conditions. # Features: Fits Ford Mustang 4.6L SOHC Motors w/ 6 bolt pattern from 1996-2004 # Also fits Ford Mustang 4.6L DOHC w/ 6 bolt pattern from 1996-1998 # 164 tooth count # Internal balance # Current, up to date S.F.I. 1.1 approval sticker picture is generic To Order Only.