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Engine Piston Kit (0.50mm) Cummins 4089422 | 4898822, 3972881, 3920691, 4089181
Restore your engine’s compression and performance with this premium 0.50mm oversize piston kit for Cummins 6BT 5.9 and Komatsu S6D102 engines. Engineered for maximum durability and precise fitment, this kit includes the piston, rings, and pin to ensure a reliable rebuild.
Description
High-Performance Engine Piston Kit (0.50mm) for Cummins Engines
The Cummins 4089422 piston kit is a premium-grade, 0.50mm oversize replacement designed to restore optimal compression, combustion efficiency, and power output in heavy-duty diesel engines. Engineered to withstand extreme thermal and mechanical stress, this complete kit is essential for professional engine overhauls and inframe rebuilds. This part is also available under the numbers: 4898822, 3972881, 3920691, and 4089181.
Complete Kit Components
This comprehensive piston kit includes all the critical components required for a seamless installation and reliable long-term operation:
- Oversize Piston (0.50mm / +0.50): Precision-machined from high-strength alloy to ensure exact clearances and thermal expansion control.
- Piston Ring Set: Engineered to provide an exceptional seal against the cylinder wall, minimizing oil consumption and blow-by.
- Piston Pin & Retaining Clips: Hardened and tempered for superior wear resistance and structural integrity under heavy loads.
Engine Fitment & Compatibility
This piston kit is designed for heavy-duty applications and is compatible with the following engine models:
- Cummins: 6BT 5.9 (102mm bore engines)
- Komatsu: S6D102
Key Benefits
- Enhanced Durability: Manufactured from advanced materials to resist scuffing, cracking, and high-temperature wear.
- Precise Tolerances: CNC-machined to meet strict dimensional standards, ensuring smooth operation and reduced friction.
- Complete Rebuild Solution: Includes piston, rings, pin, and clips to simplify the ordering and installation process.
Cross-Reference / Interchange Part Numbers
This part replaces / is interchangeable with the following part numbers:
- 4089422
- 4898822
- 3972881
- 3920691
- 4089181
- 504208815
- 125605
- 125605MEC
- 125625
- 125625MEC
- 2992559
- 2994047
- 2995672
- 2996099
- 2996317
- 2996854
- 504019499
- 855605
- 855605MEC
- 87-145007-00
- 3934047
