Just started the shopping process and was a little confused about the differences between the 2004 and 04.5. Is the Cummins 600 only in the 04.5's. What other differences are there?

 

The 04 has the 305/550. The 04.5 has the new and improved 325/600. The 04.5 has a 3 pulse injection system, full 4" exhaust system, larger turbo, redesigned head and bowl pistons, larger air box and its suppose to be a little quieter with lower emisions. Thats about it.

 

Thanks!

 

I just test drove a 04.5 crew cab 4x4 with a 6 speed today and had a real hard time not driving it home. I am definatly going to wait till I find a 600 that has all the options I want instead of going with an 03 or 04.