Wings exhaust arrived promptly. Vanasche has a great reputation in the industry, and I can see why. The wings slip-on for my KTM 690 is a beautifully finished product. Install is pretty simple. Wings says to re-use your graphite crush washer, but I recommend having an extra one handy because the old one can easily crack when you take it off your original system. Wings is a pretty awesome company. They even included a free Wings t-shirt!!!. Really nice exhaust. Titanium and carbon fiber is gorgeous. It sounds really nice. Good thump at idle, but pretty quiet, until you crank into higher RPM's. I have only put about 50 miles on the bike since installing but it runs awesome and sounds awesome! I will not hesitate to order future products, any chance I get, from Vanasche.