I've done some measuring and I came up with this to run straight pipe; need a peice of 4" pipe 33" long and flared on both ends. I actually have a very long peice of 4" exhaust pipe on and old school bus here at work I can get for free. I figured then all I would need to do is take the section of pipe to an exhaust shop and have both ends flared about 4" back on both ends. You guys that have done this, do you think my little plan will work?

 

If your truck is stock like your sig says 4 inch is too big but maybe I am missing something

 

If your just wanting to get rid of the muffler I think the stock system is 3.5". Persoanolly if you have acces to about ten feet of the stuff off of the schoolbus I would just go 4" downpipe back.

 

2nd gens are 3".

 

Yes the truck is stock but, I'm measuring the OD of the NON-flared portion with calipers and its measuring 4". I'll go back and check though. Thought this was kinda big also.

 

4" will HELP a stock truck...

 

Yep its 3" I was measuring the pipe between the muffler and the Resonator.

 

Flare the front end of the "Spacer pipe" you will be putting in, but at the tail end you will want the spacer pipe to slide into the remaining exhaust pipe and not over it. Maybe I'm being a little **** here, but this is the right way to do it for proper air flow. Get the piece after the muffler flared so the spacer will slide into it.

 

No your not, thanks for telling me this I appreciate the help. Can you describe which end and a lttle mor about this spacer? Are you talking about the portion between the resonator and the muffler maybe?

 

If you just drop the muffler you'll need to go from 4" to 3". If you drop the res. too you'll need 3" all the way. I used a piece of 4" flex with a 4"-3" bell on one end. I used stainless wrap clamps and a mig (3" side, a clamp is in the way) for install.

Randy

 

Yeah I see what you mean. I plan on running a 63" peice of 3" pipe clamped on both ends and just droping the res and muffler.

 

Yeah, at the end of your 63" pipe, you want that to slip into your existing exhaust pipe. Take it out of the truck and take it down to your local exhaust shop and have them "Bell" the end so it will fit over your new pipe. Problem solved! Good luck

 

Did the exact same thing on 01. I went down to the brand new muffler shop which was a brand name and picked up a section of 3 inch pipe. I got the guy to bell one end and then I asked him to make me a 6 inch piece and basically bell both ends which opens up the whole piece to slide over the 3 inch pipe. Put the 6 inch piece over the non-belled end and then slip the belled end over the front pipe and then slide the 6 inch piece back to cover both the new pipe and old pipe and clamp it all down. I figured out the sliding piece to make the install easier for one person to handle.

I am really considering going up to 4 inch pipe as I do alot of heavy towing and will be adding a box and injectors soon. Then of course a trans, then bigger turbo, then bigger box, then.........

Chris

 

Nice, thanks. Guess my idea will work then, my local exhaust shop said they'd sell me the 63" peice and flare both ends for $30.00. good price I thought.

 

Dont know if you can make it a straight run. When I had mine done it has a 2" offset in it to make up for the inlet and outlet of the muffler or resonator. With the offset it fits perfect!