ACT 12-18 Jeep Wrangler JK XACT Flywheel ProMass

601060 is a Pro-Mass flywheel, developed with greater inertia for improved climbing and pulling cabilities. Proper mass distribution gives optimal increase of inertia with minimal weight penalty. ACT flywheels can be resurfaced with no need to purchase additional parts.
XACT Flywheel Pro-Mass
Confidence-inspiring momentum over obstacles, excellent for large tires, rock crawling, or towing, reduced driveline slop compared to dual-mass, no gear rattle; Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life;One piece construction provides an efficient heat sink for the clutch and less chance of failure. Eliminates troublesome dual-mass design, warped inserts or loose ring gears;Recommended for street and off-road use;Forged, CNC machined and dynamically computer balanced for smoothness and reliability