4-2 Exhaust Silencer Kit Fits: CBR1100 XX BLACKBIRD 1997-2007 - Designed to fit the OEM Downpipes and our own Black Widow Downpipes. - Fits and works on both carb and injected models. - Linkpipes have the centre stand bracket, allowing you to retain the stand. - Baffle is removable. - Link pipes, silencer mounting straps, clamps and gaskets included. - Link pipe Material: 304 Grade Stainless Steel - Silencer Material: 304 Grade Black Painted Stainless Steel - Silencer Body Length excluding tips = 230mm - Silencer Body Diameter = 84mm - Silencer Code: BG23R - See our Silencer Specifications Tab for length noise levels. - 2 Year Unlimited Mileage Warranty.