This MBRP(R) dual quad rear exit performance exhaust design on the Ford Mustang GT 5.0L with its innovative design including 3" Mandrel-bent tubing allows for a +35% increased in flow over stock in track mode. This aftermarket exhaust system is carefully engineered to stay true to the Ford Mustang Active design which has 4 modes for Active exhaust. The 4 modes are Quiet, Normal, Sport and Track and the MBRP Active exhaust makes an incredible difference in both design and sound. The exhaust system is equipped with straight-through sound absorption mufflers and a Helmholtz Resonator that keeps the Drone level minimal for perfect highway driving conditions. We love the Ford Mustang OEM Active system. Quiet mode start up definitely keeps the neighbours happy for those early morning engine starts. Knowing that Sport Mode or Track mode is available with the Mustang Active exhaust, it takes your driving experience to a new level at the track or simply cruising the streets. The MBRP(R) Ford Mustang Active exhaust system uses larger piping compared to the factory exhaust system with 3" O.D. mandrel-bends T304 stainless steel piping which includes a Limited Lifetime warranty. At MBRP we stand behind the quality of work with excellent craftmanship and welding by MBRP welders. The Ford Mustang GT exhaust tips come in T304 stainless steel with a Carbon Fiber shell and MBRP logo centered on top for each tip. This is really the cherry on top for this Cat-back Dual Quad Split rear exit performance exhaust system and blends in with rear bumper perfectly. Ford(R) and Mustang enthusiasts should consider this exhaust system based on quality and overall sound upgrade that matches the race design of the Ford Mustang GT.