NOCE is brand of exhaust by Experience welder team whom make many type of exhaust bikes. Our products are handmade with best quality, giving you best experience when you instal on bike, increase sound powerfull and looks gorgeous. Using stainless steel 2mm thickness. (custom blue, polish, rainbow, or black power coating resist in heat, end carbon kevlar).O2 sensor bugs: harley davidson injected series (Size M12 or M18). Our product is designed to harley davidson all series start from 1986 until up. Converter O2 bugs M18 to M12 (for injected). Before place an order kindly message us type and year bike, midle or forward control, and inject or carbu. We accepting your own model exhaust, just send the concept we will make it for you.