MAHLE S42221.020 PISTON RING SET (.020) FOR 1989-2002 CUMMINS 5.9L ENGINE

The MAHLE S42221.020 is a premium piston ring set designed for the 1989–2002 Dodge 5.9L Cummins engines, including both 12-valve and 24-valve variants. This set is ideal for engine rebuilds requiring a 0.020" overbore, offering enhanced durability and performance.

 Specifications

• Bore Size: 4.036 inches (102.514 mm)

• Oversize: +0.020 inches

• Material:

  • Upper Compression Ring (UCR): Ductile iron

  • Lower Compression Ring (LCR): Cast iron

  • Oil Control Ring (OCR): Cast iron

• Facing:

  • UCR: Ceramic chrome

  • LCR: Not applicable

  • OCR: Not applicable

• Axial Height:

  • UCR: 3.00 mm

  • LCR: 2.38 mm

  • OCR: 4.00 mm

• Ring Type Codes:

  • UCR: RFK-18U

  • LCR: BT-10

  • OCR: GCL-40UAW
    

 Vehicle Fitment

This piston ring set is compatible with the following vehicles:

• Dodge:

  • D250

  • D350

  • W250

  • W350

  • Ram 2500 (1994–2002)

  • Ram 3500 (1994–2002)

 Additional Notes

• Sold Individually: Each set contains rings for a single cylinder; a quantity of six sets is required for a complete engine rebuild.

• OE Quality: Manufactured to original equipment specifications, ensuring reliable performance and longevity.

• Installation: Proper installation is crucial; ensure all mating surfaces are clean and free of debris before sealing

The MAHLE S42221.020 Piston Ring Set is meticulously engineered to meet the high standards of performance and durability required for the 1989-2002 Dodge 5.9L Cummins engine, encompassing both the 12-valve and 24-valve variants. Crafted for engine rebuilds with a 0.020” overbore, this piston ring set enhances the efficiency and functionality of your engine, ensuring optimal performance during operation.

With a bore size of 4.036 inches (102.514 mm), this piston ring set is constructed from high-quality materials for reliability and longevity. The upper compression ring (UCR) is made from durable ductile iron and faced with ceramic chrome, providing superior wear resistance and sealing capability. The lower compression ring (LCR) utilizes robust cast iron, while the oil control ring (OCR) is also crafted from cast iron, delivering efficient oil management to reinforce engine performance.

Each piston ring set contains rings specifically designed for a single cylinder, necessitating six sets for a complete engine overhaul. Engineered to meet or exceed OEM specifications, the MAHLE S42221.020 offers peace of mind with its OE quality assurance, enabling seamless integration into your vehicle’s engine.

Compatible with a variety of Dodge models, including D250, D350, W250, W350, Ram 2500 (1994-2002), and Ram 3500 (1994-2002), this piston ring set promises to rejuvenate your engine, restoring it to its former glory. Proper installation is essential to maximize performance; therefore, ensure all mating surfaces are meticulously cleaned prior to assembly. When it comes to enhancing the lifespan and efficacy of your Cummins engine, the MAHLE S42221.020 Piston Ring Set is the essential choice.