ok, so i wanna true dual my truck with dynomax ultra flows, with the x-pipe and I wanna save for some ASM headers. i know they are expensive, but so many people say they are good.Besides, i rather wait and get what i want instead of settling.im making it all 2 1/2 pipes. But, my question is what kind of gains can i get from this? Its a stock 5.3 with a aftermarket airbox. I wanna get a predator tuner also. Ill wait for more mods for the nelson tune.

 

A lot of people on here will tell you not to get the predator because you can't resell and they tend to crap out a lot. I don't know if they have worked out all the kinks but I don't want to be the one to find out. I would suggest getting a used HPP3 and resell it when you are done with it.