how much cfm needed for muffler?
 

how many cfm does the 12v need to breath properly? i am thinking of ditching the muffler/cat and putting a 4" vertical truck muffler horizontally under my truck, i currently have no mods but i am likely to do a little tweaking eventually (not too much though as trans is stock)

i want a little more sound and a little more flow and i can get a donaldson truck muffler for like $80. i would have to re engineer my hangers a bit and put an adaptor on the turbo pipe to get it to 4" (new turbo pipe not in the budget right now) i would likely just put an elbow out of the muffler and dump it in front of the rr wheel .

am i waisting my time/money, or would this give me a little more flow?

Since your looking at a performance muffler, I highly doubt it would flow less than stock. I don't really see why CFM would matter.

its NOT a gasser do the muffler and cat delete and call it good best 35 bucks i ever spent on exhaust runs better now

Save the money for now and do a turbo back 4" use the ask for a price quote function on here for a turbo back system I did and payed 300 shipped to my house pm me and I'll tell u where I got it from it was a site vendor

do some research on here and at vendors on here. i found a complete 4" system for $265 online. thats shipped to my house in oregon. i havent purchased it yet cuz i opted to save up to get the 4" system and the bhaf at the same time. good luck!

Mine would of been a little cheaper but I also got a tip for the 300

for good flow an cheap cost, 4 inch turbo back stainless...your truck would love it...my 96 1 ton dually has 5 inch MBRP with muffler, an truck loves it, low egt's an nice sound

If you want cheap do the straight pipe route, it's not a gas to diesel issue. It's turbo or non turbo and rpm thing. If you have a turbo gas with a complete tailpipe system it could meet 50 state noise regulation like a 03-05 dodge neon srt-4. I miss my neon... I digress:). If you are cheap cut the cat and muffler and install a straight pipe until you save for a complete 4 or 5 inch system