3 inch stainless constant-diameter direct-fit cat-back system cuts backpressure up to 79 percent and flows up to 138 percent better. Throaty sound, huge polished tip. Formed of heavy-duty stainless steel, Banks increased-diameter mandrel-bent Monster exhaust pipes (3 inch intermediate pipe and 3.5 inch tailpipe) bolt behind the catalytic converter, cutting backpressure up to 79 percent and increasing flow up to 138 percent for increased power, longevity and fuel efficiency. The polished-stainless straight-through muffler outflows stock, and delivers a commanding, yet civil, exhaust note. The system includes Banks exclusive ob-round (patented design) angle-cut rolled-edge tailpipe tip in your choice of polished chrome-over stainless or high-temp black! And to keep it looking good, there's a 1/2 inch air gap to help keep heat from tarnishing the finish. An adjustable clamp lets you position it on the tailpipe just right. The lightweight, direct-fit-system bolts on easily. Fully compatible with Ford's factory warranty, the entire system is covered by Banks 5-Year Limited Warranty. Monster Exhaust System, Single Exit, Chrome Obround Tip for use with 2004-2008 Ford F-150/Lincoln, SCLB-ECMB Standard Cab Long Bed to Extended Cab Medium Bed Key Features: Mandrel bent Stainless Steel construction Virtually eliminates backpressure Lowers exhaust gas temps Dramatically improves flow Maximum Airflow 3 inch stainless constant-diameter direct-fit cat-back system Cuts backpressure up to 79 percent Flows up to 138 percent better Huge 4.38x5.25 inch CHROME tip US Patent #5,581,111 S1 CARB E.O. Not Required