psdguy95
New member
Anyone who has a 4 inch down pipe on there obs can you post up some pics please? I'm curious to see how it looks.
I know the 3inch is good. I didn't know it was that hard to get a bigger one in it.
I have a 4" and its tight. It was homemade many years ago not by me.
i'm in the process of gathering all the parts to put on a garett 38. exhaust outlet is bigger than the stock. I either need to put on the 4" or find just the flange and weld it to the 3" downpipe. So I'm also interested in fit. I haven't been able to find just the flange. Anyone have any ideas other than buying the 4" downpipe and cutting off the flange?
The flange will be the same as a stock 99-03 7.3L 3" factory down pipe. Someone has to have one laying around in a scrap pile.
thats all I do with my truck is tow (20,000 lbs gross) and I needed all the cooling I can get....
and Yes, it did help, especially down lower in the RPM range, from about 1500 to 2100, more torquey, and I can run more boost @ the same Pyrometer reading....probably took about 150 degrees off the pyro everywhere....
just my opinion....