Just installed my new Werks 2013, switching from a TTR 2035 on my B5 in my RC8T. The Werks pipe/header combo was shorter so I had to install a new pipe mount. The engine fired right up and spit out alot of raw fuel/aro. My initial reaction was to lean it, but it stayed running so I left the needles alone. It took awhile to get warmed up, but once it did I didn't feel the needles needed any adjustment. I was quite surprised but those were my findings. Granted this was only one tank and not on a track; I will track test under race conditions this Sunday. The sound was definitely different, more of a growl, and definitely more snappy down low. Can't wait to see this baby on the track head to head w/ other truggies!