Made from 2.5" mandrel bent stainless steel tubing for long life, this Magnaflow Axle back exhaust system features two straight-through mufflers that end with brightly polished 4" stainless steel quad tips. This Magnaflow Competition Axle-back Exhaust System with Quad Tips is specifically designed to be installed on the 2011 to 2012 Mustang GT's equipped with the 4 valve 5.0L Coyote engine. Please note: Installation of the Magnaflow Competition Quad Tip Axle-back Exhaust requires a new rear fascia or modification to the stock bumper cover. A template is included. Product Benefits 4" Polished quad tips Stainless steel construction Aggressive musclecar sound Manufactures lifetime warranty