7.3 OBS Powerstroke Dyna Max 425HP Clutch | South Bend 1944-5OKHD

Upgrade your 1994.5–1997 Ford 7.3L Powerstroke OBS truck with the South Bend Clutch Dyna Max 425HP Organic Clutch Kit (1944-5OKHD). This heavy-duty single-disc clutch kit is engineered specifically for the ZF 5-speed manual transmission and includes a complete solid mass flywheel conversion, making it the perfect choice for modified OBS trucks that need reliable holding power without sacrificing street manners.

Why the South Bend Dyna Max HD Organic?

The Dyna Max series uses performance organic friction material that delivers smooth, progressive engagement with excellent drivability. Unlike aggressive ceramic or dual-disc clutches, this organic disc provides low pedal effort and reduced chatter—ideal for daily driving, towing, or moderate performance builds.

This HD (Heavy Duty) version features upgraded components for higher torque capacity:

• Extra-wide and thicker clutch lining
• Reinforced pressure plate casting
• Robust solid-mass flywheel

It easily handles up to 425 horsepower and 850–900 ft-lbs of torque (with up to 20,000 lb towing capacity in many applications).

Key Benefits

• Solid flywheel conversion — Replaces the factory dual-mass flywheel (a common failure point on tuned 7.3 Powerstrokes) with a durable billet/ductile steel solid flywheel for superior strength and consistent clamping force.
• Smooth street performance — Organic disc material offers excellent bite with comfortable daily driving characteristics.
• Complete conversion kit — Includes everything needed: clutch disc, pressure plate, solid flywheel, throwout bearing, Kevlar pilot bushing, alignment tool, and mounting hardware.
• Proven durability — Kevlar pilot bushing and heavy-duty components extend service life under higher power and torque loads from tunes, injectors, or turbo upgrades.

Technical Specifications

• Disc: 13" (330mm) full-face organic, sprung hub
• Input shaft: 1.250" diameter, 10-spline (ZF5 compatible)
• Flywheel: Included solid mass (ductile steel)
• Pilot bushing: Kevlar (included)
• Throwout bearing & alignment tool: Included
• Stage: 2 HD Organic (Dyna Max)

Vehicle Fitment

1994.5 – 1997 Ford F-250 / F-350 OBS with 7.3L Powerstroke diesel and ZF 5-speed manual transmission.

(Some 1998 models may fit—verify your transmission and input shaft before ordering.)

Note: This is a solid-mass flywheel conversion kit. It will not work with the factory dual-mass flywheel. Professional installation is strongly recommended.

Perfect For

• Street-driven OBS trucks with mild-to-moderate modifications
• Daily drivers that occasionally tow
• Owners wanting a smooth, reliable clutch upgrade without the harshness of a full race clutch

South Bend Clutch is one of the most trusted names in diesel performance clutches. The 1944-5OKHD Dyna Max kit gives you the perfect balance of holding power, drivability, and longevity for your 7.3 OBS Powerstroke.