Just picked up my 08 RKC. SuperTrapp SE slipons, SERT, SE AC. Wow - what a difference over stock. Should have done this a while ago but in thinking about it i'm kinda glad i waited so the difference would really be noticeable. The first 4,000 miles were great - the remainder will be really great. Forgot to ask what map the wrench used but my dealer does a lot of these and the map they use works good on them. Will probably dyno when it's time for a new rear tire.