Engine Piston Kit Cummins 3943367 | 3800320, J800320, J943367

High-Performance Engine Piston Kit for Cummins ISC & QSC 8.3L

Restore your engine’s compression and combustion efficiency with this premium-grade engine piston kit, specifically engineered for heavy-duty Cummins ISC 8.3 and QSC 8.3 diesel engines. Featuring part number 3943367, this piston is built to withstand extreme thermal and mechanical stresses, ensuring reliable power delivery and extended engine life. This part is also available under the numbers: 3800320, J800320, and J943367.

This complete piston kit is designed to meet or exceed rigorous industry standards, offering a precise fit and exceptional durability. It features dual Al-fin inserts for superior wear resistance in the ring grooves, making it ideal for demanding commercial and industrial applications. Please note that this piston is designed for non-cooled gallery configurations.

Technical Specifications:

• Piston Diameter: 114 mm
• Combustion Chamber Diameter: 69.50 mm
• Total Height: 120.50 mm
• Compression Height: 78.95 mm
• Piston Pin Dimensions: 91 mm x 45 mm
• Piston Ring Configuration: 3.5T x 3T x 4
• Cooled Gallery: No
• Al-fin Insert: Yes (x2)
• Kit Components: Piston, wrist pin, and retaining clips

Engine Compatibility & Fitment:

This piston kit is compatible with the following heavy-duty diesel engines:

• Cummins ISC 8.3
• Cummins QSC 8.3

Note: Please verify your engine serial number (ESN) and critical dimensions before ordering to ensure correct fitment. Pistons that have been mounted or show signs of installation are not eligible for return.

Cross-Reference / Interchange Part Numbers

This part replaces / is interchangeable with the following part numbers:

• 3943367
• 3800320
• J800320
• J943367