Well currently i have a 2.5" downpipe going straight into a 2.75" exhaust, and you can see my numbers in my sig... what im asking is how much of a difference would switching to a 3" downpipe make, while sticking with the 2.75" exhaust... would it hurt more than help only for the fact that it would be getting choked up a bit by the exhaust?? any help would be great... thanks in advance...

 

best guess is only 5-10whp

 

alright thanks... only reason i am considering it is because the shop that made the downpipe was supposed to make a 3" but made a 2.5" downpipe... thanks a lot