Hi, just fitted one of these to my 310r. I'm really impressed with it. Full stainless system with carbon fibre tip. Came from poland via ebay for £190. Took about five days to arrive in uk. Its really easy to fit if you have the right tools. Sounds awesome and feels much more responsive through the rev range. Looks great. Turned my 310 into a wilderbeast ! I recommend this company they are excellent.