Reman Cummins ISL Engine Block 5271266 (Flat Tappet Style)
Reman Cummins ISL Engine Block 5271266 (Flat Tappet Style) Compatible Engine Models: Cummins ISL (such as ISL8.9, ISL G320, ISL CM850/CM2150), ISC EGR, QSL9, and 6C8.3 series Alternative/Interchangeable Casting Numbers: Often cross-referenced with numbers like 3970955 or 5271266-R1 1- year warranty Ships For Free
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