This is a New Arrow muffler for the competition evo systems.. So it is a 65mm Diameter to fit the link pipe that goes from 50 to 65mm which is what Arrow does on their Competition EVo systems making it nice as it is not model specific. The muffler was a spare for our race bike and the box was only opened to take a photo of it. It would require the carbon strap which I do not have a spare and they are sold separately however this is a great spare for someone running the evo system currently. $450 shipped
