I tried to get one but Paccar will not put it or the ISL into a Pete 330-335. They are coming out with a heavier duty 340 in 2007? with larger engine options? The C9 has/had no EGR or twin turbo when it came out; I'm not sure now... For the power, durability, and wet sleeves, I don't think one can go wrong. The only knock I had was when it came out you could not get any type of exhaust brake, and I doubt it is avail. now with a compression (Jake) brake. The heavy Sterling 9500 is the only truck you can get it in as far as I know...