Cummins 3.9L, 5.9L Flywheel with Gear, 3946387

12.25 inch clutch
replaces 3946387, 3942798, 3923099, 3920379
Design: Flat Mounting: 8 Bolt Holes Size: SAE #3 Clutch: 12 1/4 (310 MM) Ring Gear: 3910903 15 3/8 O.D. 152 Teeth Pilot Bearing: Needle BearingPilot Bearing Bore Diameter: 25.4mm
Be sure to check SAE position and dimensions before ordering. All of our Cummins flywheels are precision machined to meet or exceed OEM specifications.