im really close to purchasing a DP tuner for my truck. i am trying to figure out what tunes to get. im pretty sure i want the stock, no start, 60tow, 80econo, 120, and either 140 aggressive or extreme. i know the 140 aggressive puts out alot of smoke which i think is pretty awesome and i really want but the only problem is i have 4 inch straight pipe exhaust dumping underneath the cab. i really like the sound so i dont want to change the exhaust but im not sure if its a good idea to dump all that smoke underneath the cab. should i just get the 140 extreme instead? is there any performance difference in the two?

 

I would get the 140 agressive. You will be very happy with that choice. As for the smoke under the cab you will be moving most of the tyime when you blow smoke so i dont think that the smoke under the cab will be a big deal.