Brand new in box. Had it installed by a local shop, and then took the bike and parked it until I could get an appointment with a dyno tuning shop. The dyno shop owner convinced me to buy a Thundermax with O2 sensors. Only driven with it for a few miles. I have the receipt and warranty paperwork. Fits 2002-2006 Harley-Davidson touring models. Email, text or call Ronnie if interested.