3802421 Genuine Cummins Piston Ring Set For 4BT 6BT Engines

Product Overview:

3802421 is an Cummins standard 102mm piston ring set for Cummins 3.9L/5.9L B-series engines. With ceramic-coated and alloy construction, it delivers excellent wear resistance, reliable sealing and oil control. Compatible with 4BT/6BT/ISB engines for truck, machinery and generator use, it is a direct  replacement for stable engine overhaul.

Key Features：

✅Cummins standard STD size 102mm three-piece piston ring set

✅Top ring with ceramic coating & boron-copper-chromium alloy for high wear & heat resistance

✅Spring loaded combined oil ring, efficient oil scraping to reduce oil consumption and carbon deposit

✅Precise clearance for stable compression, stop blow-by and power loss

3802421 piston ring set Specification:

✅Road Transport: Medium-duty trucks, passenger buses, Dodge Ram pickups

✅Construction: Loaders, excavators, forklifts, bulldozers

✅Industrial Equipment: Generator sets, air compressors, marine auxiliary engines, agricultural tractors

Why Choose US?

✅Price Advantages of Authorized Cummins Agents in China

✅Genuine Cummins equivalent quality, strict factory inspection

✅Full Cummins engine parts inventory, fast dispatch

✅Global door-to-door shipping in 5–7 days

✅Professional technical team for fitment support- Factory direct pricing, flexible MOQ