Mrs Mad082

too lazy to change usernames, your top speed will be slower on a single speed than a flat bar road as the gearing is made to be at a ratio that gives a mix of low gearing for climbing and higher gearing for on flats/down hill.

just go 2". my has a 2" (stock is about 1 3/4 or 7/8) and it made 112fwhp. it is genie extractors, stock cat and shitty 2" press bend cat back. and it revs all the way out to 7500. i didn't really notice any gain from the exhaust but i noticed a huge gain at high rpm from the extractors. people with the 2.25" system don't really gain much, and it is only at high rpm that there is any gain. at lower rpm both the 2 and 2.25 will flow about the same.