LOUISVILLE, Ky. — Cummins announced at the Mid-America Trucking Show the ’07 ratings for its heavy-duty ISX and ISM engines.

A full lineup of ratings will be available for the ’07 ISX and ISM. The 2007 ISX gets three new ratings: the ISX 425 SmartTorque (ST), the ISX 485 ST and the ISX 600.

The ISX 425 SmartTorque provides extra torque – 1,550/1,750 pounds-feet of extra torque. This higher-operating torque level will allow drivers to stay in top gear longer, maintain road speed better and shift less often on grades. This unique SmartTorque rating will increase the percentage of time in top gear along with providing increased driver satisfaction. Increased time in top gear and less shifting mean better fuel economy. The ISX 425 ST rating will be ideally suited for truckload fleets, according to Cummins.

The ISX 485 is designed for the premium truckload market. Customers will have a choice of either a straight rating or a SmartTorque rating. The ISX 485 ST delivers on the performance and fuel economy needs of these customers.
For owner-operators, Cummins will offer the ISX 600 with 1,850 pounds-feet of torque. This will be the ideal rating for heavy haulers and owner-operators who demand extra performance, Cummins says.

All of the new ratings are compatible with a range of automated and manual transmissions. Customers selecting the ISX 425 SmartTorque will have options for selecting various transmissions to optimize for best operating efficiency in their specific fleet. The ISX 425 SmartTorque is ideally suited for both direct and overdrive transmissions.

The new ISM heavy-duty engine will also feature enhanced fuel economy for 2007 and will include 410 and 425V horsepower ratings.

Both the ISX and ISM for 2007 will be available in limited production in fourth-quarter 2006, with full production beginning in January 2007.