ok so my muffler has a huge hole in it and will be replacing soon...if i'm gonna replace it i might as well upgrade the exhaust...gonna go with a thrush welded turbo muffler i think,but my question is what size is best for performance,too big or too small are both bad and definately dont want it as loud as it is now lol....the cat (95 so there is only the 1) is already gutted,i checked when i thought it was plugged,so figure upgrade from catback...was thinking 2-1/2" but didnt know if i should just go 2-1/4"...figure replace pipe to muffler,muffler, than tail pipe exit out the back instead of a turndown @ end of muffler like it was when i bought it..what do you guys think?