are mac's 3 1/2 inch tail pipes for my setup
 

i Ordered Macs 2 1/2 inch cat back system today. I told them that i wanted 2 1/2 mufflers to 3 inch tail pipes. they told me that they wouldnt be able to get me that for two weeks. And then they asked me if i wanted 2 1/2 mufflers to 3 1/2 tail pipes. and i told them no i didnt want that. I was just wandering if 3 1/2 inch would be to big for my setup. Later on in about a month ill probably order 3 inch tail pipes for it.

For that set up 2.5 all the way is enough.