South Bend 1944-6OK-HD 7.3 Powerstroke HD Organic Clutch Kit with Single Mass Flywheel – 425 HP / 900 ft-lbs

Upgrade your 1999–2003 7.3L Powerstroke with the South Bend Clutch 1944-6OK-HD Heavy-Duty Organic clutch kit. This Stage 3 single-disc clutch is engineered for trucks making up to 425 horsepower and 900 ft-lbs of torque while supporting up to 20,000 lbs of towing capacity.

Built with South Bend’s proven HD-Organic design, this kit delivers smooth, stock-like engagement with excellent heat dissipation and low pedal effort — making it ideal for daily driving, heavy towing, and moderate performance builds. The included single-mass flywheel replaces the factory dual-mass unit for improved durability and throttle response under load.

Whether you’re towing heavy trailers or have added mild power modifications, the 1944-6OK-HD gives you the holding power you need without sacrificing drivability.

Key Features & Benefits

• Rated for 425 HP / 900 ft-lbs torque and up to 20,000 lb towing
• Heavy-duty organic friction material with extra-wide, extra-thick lining for superior heat resistance and longevity
• Heavy-duty pressure plate and single-mass flywheel for increased clamping force and durability
• Smooth engagement with low pedal effort — great for street and towing use
• Kevlar pilot bushing for extended service life
• Replaces the factory dual-mass flywheel with a stronger, more responsive single-mass unit
• Complete kit includes everything needed for installation

What’s Included

• South Bend single-mass flywheel (precision-machined)
• HD Organic clutch disc (13", full-face, sprung hub)
• Heavy-duty pressure plate
• Heavy-duty cast iron throw-out bearing
• Kevlar pilot bushing
• Flywheel/crank bolts
• Clutch alignment tool

Vehicle Fitment

• 1999–2003 Ford 7.3L Powerstroke (F-250 / F-350 / F-450 / F-550 Super Duty)
• ZF-6 6-speed manual transmission only

Note: This kit will not work with the factory OEM dual-mass flywheel. The included South Bend single-mass flywheel must be used.

Important Installation & Break-In Notes

• Break-in procedure required: Drive approximately 500 miles of normal stop-and-go driving before towing heavy loads or aggressive driving. This allows the clutch to seat properly and maximizes clutch life.
• Avoid down-shifting during the break-in period to prevent uneven wear or flywheel damage.
• For best results on higher-horsepower or heavy-towing applications, consider replacing the hydraulic assembly and clutch release fork at the same time.

Why Choose South Bend Clutch?

South Bend Clutch is one of the most trusted names in diesel performance clutches. Their HD-Organic kits are specifically designed for Powerstroke trucks that see real-world use — combining holding power with excellent street manners and towing capability.