I will be putting on either 3" or 4" exhaust depending on the response from you guys. Apparently i can't get 3.5" here so its one or the other. Both systems will be complete with the x-over pipe and all mandrel bent. As it stands my current system is stock 3" down to the flange from factory with very little kinks in it, then reduced to 2.75" going to the cat & muffler and out the back. I'm actually thinking of splitting it off the flange and going with 1 pipe on each side under the door, kinda like the stacks on a big rig but running below the door and turned out just in front of the rear wheels. $1000 for 4", $600 for 3" going out the back, not sure on the cost going below the doors. Whats your opinions? How should i go?

I think the bigger diameter the better but it's your money.

Why don't you E-Mail John Kennedy and see if he can ship to you in Canada? He has a 3 1/2 inch that everyone I seen has been happy with.

where would you guys exit your exhaust?? out under the rear bumper, or the sides behind the tires? on a 45, 90?


The exhaust shop told me not to go straight under the rear bumper cuz if I'm pulling a trailer with a car it might get exhaust *crap* on the front of the car, What do you guys think!


Thanks!

The shorter each exhaust pipe is and the fewer bends the less restrictive and less expensive. Diesel exhaust leaves a dull sooty coating on all it touches. having said that I want you to look again at the exhaust pipe pictures I posted on "my truck pics". You might notice a lack of soot stains. I figured that with a slight turndown at that location you would expel your exhaust into the stream of atmosphere that runs under your truck while driving(that's where the frame rail goes up for the bed). I also run my boost higher and keep the manifolds sealed tight, don't want to loose any boost. The more efficiently your burning you diesel the less soot. The less sulpher in your fuel the less soot. That's why the new fuel standards are requiring less thanthe current ~.2% sulpher content. IIrc the new standard is ~.002% and costs more to refine crude to this point. Edited by: quantum mechanic

right now i have a 4" that runs out in front of my passenger side back tire. you can't do duals this way cause the fuel tank is in the way on the other side. the straigter the pipe the quieter. but if you want to keep your trailer clean, then go with the 90 or 45 degree bends. i have had both and i like 90's the best.

Or you could just go the Ghettoville Performance Shoppe route and hook up your 3" downpipe without an exhaust system.

This, of course, is a terrible idea since it will put all your exhaust right underneath the passenger cabin.

Or get the cutout

drill a hole in the bed and run some stacks!!!http://www.dieselplace.com/forum/smileys/Rock On.gif

Stacks in the bed were an idea for about 2 seconds, i have a short box with a tool box right behind the cab and an auxilary 160 ltr (42 US gal.) fuel tank under that, then the 5th wheel hitch behind that, not much room there anymore. Now it it were a stepside as the old Red Express trucks that would be cool. http://www.dieselplace.com/forum/smileys/Cool.gif

I saw a fancy powerstroke with twin stack coming to the outside of the fleetside and up. All chrome and shine. No holes in the bed of room issue.

i installed a 3" downpipe over a year ago but i was wondering if anyone had tried to spead the stock donpipe out with a spreader and a little heat?