I have an 01 with a 5.9 engine and would like to install duel exhaust from the headers back. The current exhaust system has a O2 sensor in front of and behind the converter. Is it possible to install duels with 2 converters and just sensors on half the exhaust or can sensors be wired on both sets of pipes. I would hate to go to the work and money for duels and find out it screws up the computer and have problems passing emissions. If anyone has any info on this I would appreciate any input.

 

When I bought mine it had true duals on it but it wasn't set up right. Here's a link to my thread discussing it and what I did. I got away from the true duals for a fix that was sure to work rather than try to make it work. It sounded badass though before u changed it back. Lost a lot of pep to.

https://dodgeforum.com/forum/1st-gen...t-durango.html

 

Gas mileage is much better now to.

 

The only true way with that design is to install a X pipe. You place the first O2 sensor in the middle of the X pipe and install a O2 sensor on the other side of the CAT, but even at that it would not be "true" dual pipes.

I would instead install headers at 2 1/2 inch down pipes into a true "Y" pipe into 3" single. Then install a 3" CAT with the same overall diameter as OEM then single it the rest of the way out in 3".

 

GSMotorsports is the only manufacturer that I remembered that made direct fit tru duals.

 

Correct me if I'm wrong but isn't an x pipe the best route, keeps even back pressure for both banks?

 

There have been as many arguments for a crossover as they have been against, over the years. The backpressure being "equal" isn't really as much of a concern as some would claim, and since I'm pretty sure these things don't come factory with a "tuned exhaust" (this is a misnomer, in my opinion, but another time for that), I doubt it matters much.

Ideally speaking, the less backpressure you have in your exhaust system, the more efficient a 4 stroke motor will run. I've had experience with many hot-rods over the years, most of them my own, some that weren't, and I've always noticed a power increase when adding headers and dual exhaust, sometimes significant, sometimes not. It would be interesting to install a pressure sending unit in the exhaust system and try it both ways, to see what sort of difference a crossover makes. But in my opinion....not worth the bother. If you can get two exhaust pipes under your Durango, it's probably worth the trouble. If you can't get two, maybe you can run both lines into a single oversize pipe, eliminating the need for a crossover and an actual dual exhaust at the same time.

 

U can get two pipes under the durango, mine had it.