This full 3" exhaust system features a single 4" diameter tip for a clean, subtle look. It is constructed entirely of 304 stainless steel for ultimate durability. It also features a v-band disconnect for easy installation and removal, and includes all necessary hardware and gaskets. VAREX mufflers combine both the design technology of the stock muffler and the performance muffler into one single compact unit. A sophisticated butterfly valve mechanism is implemented to redirect the exhaust gas flow and vary be-tween the two. For higher sound level, the exhaust flows are directed through the 3" opening which produces maximum power with a robust sound level (or the “sports car note”) and near-zero resistance. For lower sound levels the exhaust flows are directed through the chambered path (similar design with the stock muffler) and produces a minimal sound level that gives you the best in-car comfort. Angle of the valve is also controllable and can be adjusted to stop at any point between sports mode and silence mode. This gives you further freedom to set the optimal sound level according to your desired preference. Here is a link to the EVO systems so you can take a look. http://www.maperformance.com/product.php?productid=102238&page=1
