lol, you did not go through a hassel becasue of a CAI, a CAI is a worthless does nothing mod.
All you need for dumps is a hack saw and know how to weld. You cut the pipes after the cats for you if you want to pass emissions (then again you'll probably fail for doing this anyways) then cut the mufflers off the pipes you ust cut off and weld them to the end of the remaining pipe, then put a turndown or something after the muffler so it doesn't go straight out.
I have dumps and I'm putting pipes out the back cause it smells like ****. I love the sound but damn the smell.