Daunttless wrote:It spontaneously combusts. : )
( Please note, I am just kidding )
Hahaha, damn, you had me going.
Supposedly the KA doesn't live longer than 18months without blowing, requiring a rebuild. Dunno why, that's what most people say. As for the exhaust, I think they are transferable, but make sure to get something that's 3" or bigger. HKS Dragger, 5Zigen Fireball, A'Pexi N1, Blitz NUR Spec, etc.
You've got quite a few choices. Please note that those exhausts will be pretty damned loud with a N/A application, so be wary.
Hope I helped.
Nick.