Yea its weird, I didn't even order it, but it came with my stainless steel exhaust. I guess they felt that since I spent $300 on an exhaust, I deserved some freebies lol. There are many companies in Taiwan that offer performace parts for this bike, its just a matter of trying to find them and email them and trying to get them to send stuff to the US. BTW, I HIGHLY recommend getting an exhaust, it really opens up the engine and sounds great. It also weighs a fraction of what the original piece of crap steel exhaust weighs. I already ordered a Six Sigma jet kit off ebay for $40. I'm gonna squeeze as much power as I can out of this thing lol.