The MagnaFlow XL 4 X 9in Oval MultiChamber Performance Exhaust Muffler 13288 features a straightthrough weightoptimized reversible design with a perforated stainless steel core featuring baffles and tuning gates enabling it to deliver the powerful signature sound and dynoproven performance thats made MagnaFlow a household name Muffler 13288s ovalshaped 4x9x14in body and universal 3/25in diameter inlet/outlet layout enables flexible installation options to match the spacing requirements of your vehicle Professional installation is highly recommended 13288 is produced using advanced CNC precision robotic manufacturing techniques and features durable corrosion resistant stainlesssteel construction all backed by MagnaFlows limited lifetime warranty