This can't be good. An X or H pipe is what most use, and they weld the bung in the center of the X or H.

 

okay so ur not understanding me i have the front o2 sensor in the header and th rear o2 sensor in the other pipe with the spacer the spacer is used to pull the rear o2 sensor out of the exhaust so it think there is a cat there the front o2 sensor is just to judge the fuel trim now the reason y my truck is running like crap is cause the front o2 sensor is bad witch is cause the engine to runnin stupidly rich and causing the other o2 sensor and map sensor to go hay wirer so i put true duals on cause i like loud and mufflers and cats suck so yeah no baby x or h pipe on my truck oh yeah and y would anybody buy a truck for good gas mileage thamk u for ur imput it was very helpful

 

They understand you? you have seperate exhaust for each side of the engine with no x pipe to equalize pressure.
Running that way without an x pipe to even things out actually can often have negative performance results..most dual setups still have an x pipe for this reason like in my vette..they told me it would hurt performance without it. same deal with vw exhausts that arent merged they run rough and lose power and are mostly just for show on buggies.. Plus you still are only getting readings from one side of the engine since the other sensor is basically bypassed...

 

i did it this way cause i like loud its way louder this way and has a nice cackle i dont really want performance all thou at my school we have a dyno and i did a before and after test i used to have magnaflow duals from when i bought the truck and the only difference from that set up to now is i agained 15 ft lbs of torque hp stay pretty much the same and i did this because i dont need a cat and i wanted long tubes with true duals

 

ok, i'll go with it.... let's see what happens with replacing front 02.

 

Well,its loud and you dont care about performance so I think its working just about right for you.

 

I concur.......
You got the LOUD, and don't care about performance, and didn't buy the truck for MPG's......

Wait this is a cummings and you get 5 MPGs????????

AAAAAAGGGGGGHHHHHHH.......
I don't get it...........OH WELL........

EDIT so I re read the post you're sig shows a diesel but this is a gasser..

I still stand with the first 2 lines of my post and the 4th and the 5th and........nevermind....

 

lets play nice.....

 

sorry I'll try

 

o own both ones my daily driver(cummins) my fast toy and the gasser is my mud and trail beast i sign up to talk about my cummins and find out some stff but this came up