Originally Posted by CmptrNerd
Havent searched for the tips but I found those High Flow cats on ebay and they are pretty cheap. So 2.5'' is the size pipe on my SE then? So for the muffler Im guessing that would be 2.5'' as well.
Your pipe is 2.25" but gm usually put a 2.5" catalytic converter on, just inflated the pipe a little goin in and downsized it back to 2.25 out the back of the cat, the 2.5 will flow a little better, and yes i would also go with a 2.5" muffler, you will have a very nice flowing exhaust after you do this and should sound nice too
i kinda wanna hear one of these full boar mufflers... keep us updated.