03 Cummins questions

[bpnut]

I have a stock 03 Cummins 4x4 3500. I know nothing about tuners or chips or anything. I pull a heavy RV 5th wheel and want some extra horsepower. Don't care about speed or anything else, just want to pull trailer with more ease. I plan to put on a new high output air filter and a custom muffler. Diablo dealer suggested a Diablo tuner but did not tell me what product number or the name of the tuner. Any help on what I should do is appreciated. Sorry for the ignorance.

[johan]

The Predator part # for your truck is U7130, and i would recommend using the tow tune when pulling the RV 5th wheel. You will have more low end power and your mileage should improve as well.

[reb0957]

I would highly recommend boost & EGT gauges. The Predator on TOW hit 1500* in like 3 seconds!