we have a couple o/o with factory 2007's 450 isx . they are unable to turn power up due to internal differences ,least thats what the cummin shops have told them .thats why i suggested a higher hp that you could turn down or up to what you want .
Gotcha. What do you think about the pre emissions Cat C-15, 485 horse. Salesman at dealership told me if I could find some to buy them cause they are virtually bulletproof. Only issue will be the 5.5 mpg but I'm only running for 6 months out of the year. Looking at a cpl 07's.
He is right about those cats in that range.The new cat is a good motor it is just the regin problems.