how did you guys who did these conversions do your exhaust and what size pipe did you use? i have the downpipe from the stock truck im gonna cut it i believe its 2 3/4". and weld in a piece of pipe going down make a 90 degree bend straight down the framerail and then a nother 90 under the bed and then run a single stack mack. I really am not too fond of stacks however when im ram rodding through the mud i dont want the exhaust to rip off. i was thinking of going with a 3 or 4 inch stainless? is aluminized steel ok though alot cheaper but i assume it doesnt last nearly as long. more or less im conserned with the downpipe and how and where you got the pipe from. my turbo is a h1c i believe non intercooled (yet) thanks for the info nick.