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    1. Refrigerated Transporter

    Peterbilt offers 530-hp ISX

    March 1, 2002
    The Cummins ISX engine now comes in a 530-horsepower rating for Peterbilt Models 387, 379, 378, and 357, Peterbilt Motors Co announced. The engine is

    The Cummins ISX engine now comes in a 530-horsepower rating for Peterbilt Models 387, 379, 378, and 357, Peterbilt Motors Co announced. The engine is uprateable to 600 horsepower with no hardware changes.

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