The Cummins ratings for 2007 heavy-duty engines include three new ISX models — the 425 ST (Smart Torque), the 485 ST, and the straight ISX 600. The new ISM features enhanced fuel economy, the company ...
LOUISVILLE, Ky. — Cummins has announced three new horsepower ratings for its 2007 ISX, including a new 600 hp offering. The company also announced it will be offering a full lineup of horsepower ...
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