Cylinder Liner Sleeve 3904166 for Cummins ISB, QSB & B Series – OEM-Grade Replacement
Stop downtime from warped or scored liners — this OEM-grade Cummins cylinder liner delivers precise bore geometry and surface finish to restore compression, reduce oil consumption, and extend engine life across your ISB and QSB fleet. Built to meet Cummins’ original metallurgical specs (ASTM A436 Type 2, Class 30), it’s drop-in compatible without honing for most rebuilds. Exact fit for ISB6.7 CM2250/CM2350 B101 and QSB5.9 CM850(CM2850) — no guesswork on interference or deck height Includes micro-finished internal surface (Ra ≤ 0.4 μm) for optimal piston ring seating right out of the box Ships from Guangzhou warehouse in 2–5 working days — no waiting weeks for OEM backorders Verified against DS-3904166OS and 3904166 cross-references to prevent mismatched kits