Do you think ill Gain hp making it 2.5"? Also in the future im prob gunna get a 2.5" ebay header. Like this:
http://item.mobileweb.ebay.com/viewi...id=30664278405 do u think with my cold air, those headers and a 2.5" exhaust w/ my n1 mufflers 3.5" tips ill gain some power? I also expect to backfire real nice >=]