Pro Series Flexplate SFI 29.1 88-09 5.9L

The Pro Series Flexplate SFI 29.1 88-09 5.9L is a premium flexplate engineered for Dodge, RAM, and Cummins platforms running the legendary 5.9L diesel or gas engine. Built for serious enthusiasts and mechanics who demand reliability in high-performance or heavy-duty applications, this flexplate serves as the critical coupling between your engine's crankshaft and automatic transmission. Whether you're rebuilding a transmission, upgrading to a higher-stall converter, or restoring a classic truck, a quality flexplate ensures smooth power delivery and eliminates vibration issues that plague worn OEM units.

PRW Industries manufactures this flexplate to SFI 29.1 specifications, the industry standard for safety and durability in performance and racing environments. The SFI certification guarantees proper balance, material integrity, and failure containment—critical when running higher horsepower or torque loads. Weighing 10.55 pounds and precision-machined to exact tolerances, this flexplate maintains superior runout characteristics compared to stock components, reducing drivetrain harmonics and protecting both transmission and engine block. The 1.5-inch thickness and 16-inch diameter are optimized for the 5.9L platform's torque characteristics, ensuring your converter bolts securely without flex or slippage during aggressive acceleration or towing.

This flexplate fits 1988–2009 model-year trucks and is compatible with both OEM and aftermarket automatic transmissions designed for the 5.9L block. Installation requires removing the transmission and engine block inspection plates—a straightforward job for any mechanic with basic diesel or automotive experience. Pairing this unit with a quality torque converter and fresh transmission fluid ensures years of trouble-free operation, whether your 5.9L is stock or pushing serious power through a custom tune or turbo setup.