Originally Posted by viperdave
I thought I was told that you could get the rig reprogrammed at Frieghtliner for more performance and not void the freightliner warranty. There are after market programs that are cheaper but then you have warranty issues
Cummins can reprogram the ISL for different programs, but the version in the DX3 is limited to 345-350hp due to the pistons. The standard DX3 program is 350/1000. There's a program that is 345/1150 and a much better curve but thats the max you can get that Cummins will do and keep the warranty. The 450hp ISL version has different pistons and a slightly different turbo.
I'm not sure about Freightliner, but I would think any authorized Cummins dealer could do this reprogram.
By the way, nice garage!