[05RedKat600]

It's a 9 inch oval can found it on eBay around $140-$150 I think. on the listing it says it is not for road use. And i guess it has no baffle. so It should b able to **** the neighbors off. No problem. "the guy" at that shop said since its not a full exhaust it wldnt need a jet kit. The listing says " no need for remapping or rejecting" so I figure it will need one.

Yeah, the guy at the shop is a half right. Will you HAVE to rejet? No. Will the bike run like *** and pop on deceleration a lot? Yes. Besides, the jet it will do more for rideability than anything else you can purchase IMO.

I've got that shorty pipe, and my A/F screws are at three turns out. Now, it runs semi-OK, but it really needs a jet kit. Did I have to? No.