ok well ill stick with 2 or 2.25 when i get the exhaust system. If i turbo later ill sell my exhaust and get larger pipig or have a custom one done. And when i do a i/h/e setup, is there any particular benefits of using all the same brand if possible, or should i just choose high performance parts for the i/h/e from different companies.

 

i think in general a same-name exhaust system seems like it would work better, but that might just be in your head haha i think any name brand compenents (cat, res, muffler, header) combined with 2.25"/2.5" piping will be primetime exhaust = you get what you pay for