Belt Tensioner 5270123 is compatible with a wide range of Cummins engines including ISL, ISM, KTA19, QSB6.7, QSK19, QSK38, QSK45, QSK50, QS60, QSK78, and QSK95. It keeps the belt at the correct tension for reliable accessory drive. OEM-grade construction for smooth operation and long service life.

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