tailpipe tip. Tip options:2008-2011 systems come with an ob-round 5x6 inch angle-cut tip in your choice of polished chrome-over stainless or high-temp black. Key Features: Mandrel bent Stainless Steel construction Virtually eliminates backpressure Lowers exhaust gas temps Dramatically improves flow Maximum Airflow Heavy-duty stainless 3.5 inch free-flowing mandrel-bent pipe Straight-thru muffler Awesome 5x6 inch Cerakote Black Tip US Patent #5,581,111 S1 CARB E.O. Not Required