im just wondering what size piping i should use, im going to get some custom piping back from my manifold and a muffler of some sort.

i have a 91 n/a with basicaly no mods.

im thinking 2.5" pipe but i dont know if that is too big or too small

 

True dual or a single w/ Y-pipe?

 

its going to be a single back to one muffler

 

anyone have any ideas??

 

2.5" is good for N/A.

 

2.5"