2011-2017 Ford Mustang XACT Streetlite Flywheel by ACT Noticeably improved engine response and acceleration, OE to mild gear rattle; Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life; One piece construction allows less opportunity for failure and provides uniform efficient heat transfer from the clutch disc. No more warped inserts or loose ring gears; Recommended for street and race use; Forged, CNC machined and dynamically computer balanced for smooth high RPM reliability Features Product Weight (lbs.): 22.5 SFI: 1.1 Flywheel Tooth Count: 164 MaterialChromoly Steel Type: Streetlite Product Weight (lbs.): 20.5 Benefits Noticeably improved engine response and acceleration, OE to mild gear rattle Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life One piece construction allows less opportunity for failure and provides uniform efficient heat transfer from the clutch disc. No more warped inserts or loose ring gears Forged, CNC machined and dynamically computer balanced for smooth high RPM reliability Applications 2011-2017 Ford Mustang What\’s In The Box? 1 – ACT XACT Streetlite Flywheel Warranty ACT 1-Year Limited Warranty