I have an '07 650 Silverado. I just purchased a set of Jardine pipes and a Kurkuyan Hypercharger. The Hypercharger came with Jet kit. I followed this Link http://www.650ccnd.com/hc.htm for the Carb Re-Jet (First time I've ever done carb work), and then I followed the Hyper-Charger instructions to the letter. I was amazed at how easy it was to do the jets, both pilot and main. The most difficult part of the entire install was getting the aluminum screws out from the float bowl covers. I ended up using a thin pair of side cutters to break them loose, then it was no problem. I replaced them with 4MM X 12MM hex cap screws. The difference in the bike is completely night and day!! I purchased the pipes and Hypecharger from two fantastic sellers on ebay. The Hypercharger came from seller "americanclassicmotors", and the pipes came from seller "mx113". I highly reccommend both. I purchased the pipes and Hypercharger for $470.00 complete with shipping. Again, the difference in the performance is fantastic.. Good Luck!