Ok I was the most performance out of my exhaust system. So Far I have the headers on my truck and now its time to work my way down the pipe. I have 2 precats with O2 sensors after them, then the two pipes merge into a single cat (all with 2.5" pipe) then the pipe shrinks to ~2" pipe and goes to the muffler and over the axle and out behind the tire.

Now for maximum Performance gain, would it be better to cut off that cat after the O2 sensors? Would it be better to run the exhaust out before the rear tire and use 2.5" pipes? I can do true dual exhaust on the truck just by running the pipes side by side and taking out that cat after the sensors with 2.5" pipe too, or 2.25".

Or is it best to just upgrade the pipe to 2.5" and throw a borla ProXS muffler (the muffler id use on any set up) and follow the stock exhaust route?

 

bump

 

that is what i would do. if you are going to supercharge it i would go a different route, but that last option is the best one.

if you are going to supercharge it come off the headers and bring them into one pipe that has two magnaflow high performance CATs, it sound killer and performance is there.

 

I will super charge it but it will be a while. Does Single in Dual out have any performance beneifits?

 

If your going to s/c it, I would do dual. I have a bassani cat waiting to be put on, so I'm going to have the 2 cats removed and put the bassani in its place. I just need to find a y-pipe now to replace that weird looking big cat.