Quote (jimmyhoud @ May 23 2014 08:31pm)
We run all newer pete's with c15's

Damn emissions shit on them always breaking down and not a powerhouse by any means
If I'm not badly mistaken that C15 can be had anywhere from 450-6xxhp and it's easily upgraded if you have the lower power level. One of our trucking companies runs the multi torque version at 475hp and the drivers hate it for short hauls. 2 of their trucks that go OTR are the 600hp versions and they love them.
ISX15 is still the way to go imo.