Illustrative photo — the delivered item may differ in appearance. Orders are fulfilled by catalog part number (SKU).
Piston Kit Cummins 4089646-00 | 4089646, 4941392, 3966721
High-quality engine piston kit designed for Cummins QSL 8.9 and ISL engines, engineered to restore peak combustion efficiency and engine performance.
Description
High-Performance Piston Kit for Cummins QSL 8.9 and ISL Engines
The Cummins 4089646-00 piston kit is a premium-grade replacement component designed to restore optimal compression, combustion efficiency, and power output in heavy-duty diesel engines. Engineered to meet precise dimensional standards, this piston assembly ensures reliable operation under extreme thermal and mechanical stress. This part is also available under the numbers: 4089646, 4941392, 3966721.
This kit comes complete with the piston, piston pin, and retaining clips, providing a comprehensive solution for your engine rebuild or maintenance needs. It is specifically designed for Cummins QSL 8.9, QSL9, and ISL series engines commonly found in industrial, agricultural, and commercial vehicle applications.
Technical Specifications:
- Engine Compatibility: Cummins QSL 8.9, QSL9, ISL
- Standard Diameter (STD): 114 mm
- Piston Pin Dimensions: 45 mm x 91 mm
- Combustion Chamber Diameter: 89.3 mm
- Compression Height: 74.25 mm
- Total Height: 104.75 mm
- Piston Rings Compatibility: 3.5T x 3 x 4 mm
- Alfin Insert: No
- Piston Cooling: No
Cross-Reference / Interchange Part Numbers
This part replaces / is interchangeable with the following part numbers:
- 4089646-00
- 4089646
- 3966721
- 4941392
- 4955296
- 3966722
- 4945337
- 41757600
- 111742
