3802561 Piston Kit for Cummins 4BT 6BT Engines

Product Overview:

This 3802561 piston assembly is engineered exclusively for Cummins 4BT3.9, 6BT5.9, 6BTA5.9 and 6BTAA 12-valve diesel engines. Built to match original equipment standards, Primarily engineered for construction machinery (excavators, loaders, bulldozers), also widely used in medium-duty trucks and diesel generator sets.it delivers outstanding stability and long service life under continuous medium-to-heavy load conditions. The complete package comes with piston body, piston rings, piston pin and circlips for straightforward on-site installation.

key Features:

✅ Bore: 102.0mm STD, tolerance ±0.01mm
✅ Material: Forged AlSi12CuMgNi high-silicon aluminum alloy, heat & deformation resistant
✅ Chamber: Deep concave crown (12V) for better combustion & lower fuel consumption

✅ Rings: 3-piece set – chrome-moly top ring, scraper second ring, multi-piece oil ring

3802561 piston Kit Specification：

Applications：
✅ Construction Machinery: Excavators (Caterpillar 320C, Komatsu, Hyundai), loaders, bulldozers, cranes
✅ Commercial Trucks: Dongfeng, Foton, and Dodge Ram 2500/3500 (1994–1998, 12-valve P7100)
✅ Power Generation: 200–400 kW diesel generator sets, water/fire pump units
✅ Industrial & Marine: Buses, coachs, marine auxiliary engines

Why Choose US?
✅Genuine quality, perfect fit for direct replacement

✅ Durable construction for long service life

✅ Strict quality control, reliable performance

✅Competitive price & fast delivery