the boss is getting some new trucks with this motor. What is the big difference with them? How are you suppose to drive them (at what rpm's etc)? I have not driven a cummins for 30 years. These are 2012 Peterbilts...just kind of interested in what a guy can expect. They have the DEF tanks also...............
Cummins ISX 550hp
Discussion in 'Peterbilt Forum' started by hongkongcharlie, Feb 19, 2012.
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