I just took off my 3.5 in/3.5 out 22" Magnaflow and put on a 14" 3.5 in/3.5 out. I deleted the resonator sometime back. I love the new sound and in cab noise is minimal. I may change my mind once the new muffler breaks in, may have to add the resonator back, but I doubt it it. Talked to my muffler shop and we are going to order some 3.5" 90* and 45* and make a 3.5 tailpipe, instead of the 3".
I just did the BG treatment at 16,500 miles. I can honestly say the truck runs smoother, has more power, and the mpgs seem to be up a lil. I'm ordering my catch can next week, and will probably do the BG treatment every 10,000 to 12,000 miles for as long as I own the truck
You'll need a 6" to 22x14 on 33" tires to avoid rubbing. The hard part will be finding a 33" tire wide enough for that width of rim. Be prepared to start changing ball joints, bearings and other associated parts in the front end at 25,000 to 30,000 miles. It will put a large amount of extra stress on the frontend.
So I spoke to Diablo yesterday about their programmers. I'm a custom tune fan, but I wanted to see what they had to say about their claim of the programmers being undetectable. I repeatedly asked and was assured that as long as it was returned to stock, the dealer had "NO" way of seeing it. As stated before, I really would just like turn off AFM and speed limiter, not sure who to believe here. If Diablo tells people this and advertises it and it's not true, then they're opening themselves up to lawsuits.