But pulling 25K youll need em
I had good luck with the diablo pred, but due to their horrible customer service, im getting a smarty sr.

 

I also pull heavy daily and I first lost my cat then decided to drop the muffler I now have 4" straight back, infact for what I got one 4" pipe from like the down pipe to the tail pipe cost me the same as what it would have costed me for JUST the muffler elimination pipe from Genos. I paid about $100 from a local Diesel shop for the pipe and for them to install it and it really isnt that bad and I dont have drone either. I can say it was QUITE the difference in sound from my 96 with 3.5" straight exhaust that one had lots of drone!

As for a programmer I have been trying to figure out which one I want myself and have narrowed it down (I think) to the Edge Juice W/Attitude, the Commander with Xzill II, or the Bully Dog PMT. And only reason is because of the gauges being included the analog gauges I wanted were about $500 for just the gauges then add a programmer (like the smarty) you are talking a good chunk of change where as any of the 3 listed are all in one for less money and less money is a good thing when you're using your truck to make money!

 

JG FENCING,
I sent you a PM.