I just picked up an 99 blue r6. Has a full d and d exhaust w/ header and supposidly has a jet kit. How will I ever know if it does have a jet kit or with a full exhaust does it come with a jet kit or is it necessary? Also I am a big fan of K and N air filters, I have them in all of my cars, and wanted your opinions if its worth the 50 bucks? I swear ive heard before that with carb a k and n might hurt the performane, is this true? Anything else you guys can recommend would be great. Ill be posting pics soon also, love the site top notch.