5.9 Cummins Heavy Duty Clutch Kit South Bend 13125-OK-HD

Take your 5.9L Cummins to the next level of reliability and performance with the South Bend 13125-OK-HD Heavy Duty Clutch Kit. Designed specifically for 1989–2004 Dodge Ram trucks, this Stage 2 single-disc clutch delivers the perfect balance of holding power, smooth drivability, and long-term durability for moderate power upgrades and heavy towing.

This heavy-duty version of South Bend’s proven 13-inch clutch uses an extra-thick, extra-wide 3-inch premium organic lining on a full-face sprung disc with a heavy-duty 6-spring hub. The result is excellent heat dissipation, reduced wear, and confident torque holding up to 425 horsepower and 900 ft-lbs of torque — ideal for trucks that tow up to 20,000 lbs or see regular loaded use.

The diaphragm-style pressure plate provides increased clamping force with a lighter, more predictable pedal feel than stock. South Bend includes a re-drilled and resurfaced flywheel, throwout bearing, pilot bushing, alignment tool, and all necessary hardware for a complete clutch upgrade.

Whether you’re daily driving, towing heavy equipment, or running moderate tuning, the 13125-OK-HD maintains excellent street manners while giving you the holding power your 5.9 Cummins needs.

Key Features & Benefits:

• Rated for up to 425 HP / 900 ft-lbs torque
• 13" full organic disc with extra-wide 3" premium organic lining for superior heat resistance and longevity
• Heavy-duty diaphragm pressure plate for smooth engagement and lighter pedal effort
• Includes flywheel, throwout bearing, pilot bushing, alignment tool, and hardware
• Sprung hub with heavy-duty 6-spring dampener for reduced driveline shock
• Excellent for heavy towing (up to 20,000 lb capacity) and moderate power increases
• Maintains smooth, stock-like drivability with minimal chatter
• Direct fit for 1-1/4" 10-spline input shaft transmissions

Vehicle Fitment:

• 1988–1993 Dodge Ram 5.9L Cummins – Getrag 5-speed
• 1994–2004 Dodge Ram 5.9L Cummins – NV4500 5-speed
• 1999–2000.5 Dodge Ram 5.9L Cummins Non-HO (235 hp) – NV5600 6-speed

Notes:

• Not compatible with high-output NV5600 6-speed transmissions.
• For 2004 models: 5-speed transmissions only.
• Hydraulic master/slave cylinder upgrade (sold separately) is highly recommended for improved pedal feel on these older trucks.