Well I did a fair bit of searching and just looking for more advice on this, I will be running a precision 6076e turbo with a .96 hot side I cant remember what size turbine atm but I will post it when I find the size. I want to keep running duals and not go single and I'm not sure what size exhaust to be running. Loudness does not bother me at all just looking for the best setup for the most power! It's an s5 NA-T and will just have two mufflers, no pre-silencers or anything.

 

what size is the outlet of the turbo?

 

turbo? bigger is better.

but generally just stick with whatever the snail outlet size is.

like the S475 SHOULD use 5" piping.

most smaller to mid-range turbos are 3". if you have a 4" turbo and want to see it to its max potential then 4".

larger is louder however. splitting it back into duals will absorb more of the sharp exhaust tones and split the work of the deeper ones, i prefer duals for this reason, they also flow better than a large single. for a 3" exhaust, even the stock 2 1/4" duals will still outflow a single 3" pipe all the way back.

 

Ahhhh ok, Yeah if you look it up theres all sorts of different things people say and combinations of piping etc. The turbo has a 4" outlet so I would run a 4 inch downpipe all the way back and split it into smaller pipes, or do I just continue with 4 inch all the way back to the mufflers?