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which downpipe

superv6

superv6

New member
Hey guys. Ik gettin a downpipe for the gtp and I was wonderin what I should get. Should I get the dp with highflow cat or dp with offroad pipe? What's the differences like sound performance?
 


Get the ZZP 3 inch off-road catless DP. You will get a gain in performance, nothing crazy, but it is noticable. Not to mention its a necessity for any further modding you may do. As far as sound, its a little bit raspier inside the car, not loud though. I love it.
 
They mention something on their website about havin issues with the o2 sensor cuz of the cat delete. Does it through codes or effect perf. At all? What can I do to fix the o2 sensor problem?
 
it wont affect performance, but it will throw a code unless you disable the rear o2 code with a tune or you get an o2 simulator.
 
If you get a downpipe without the cat, you will have to get the rear O2 simulator, which is damn near as much as just getting the cat in the first place. When I got my RT downpipe with cat about 4 or 5 years ago, the O2 sensor was banging against the body of the car and was very annoying. I went ahead and got the O2 simulator to do away with it. I am guessing the ZZP pipe has the correct placement so the rear O2 will not do that. The RT downpipes are way to expensive for what you get now.
 


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