997 >>08 Rear Sports Exhaust Box's Valvetronic DesignTek

3606009716 DesignTek Valvetronic sports exhaust system gives smooth 15Bhp/17 ft-lbs of torque to the wheels with the valves opened, +8HP/10 ft-lbs of torque to the wheels with the valves closed. Made from high quality 14-16 gauge T304 stainless steel, hydro-formed muffler cases, radiuses stressed relieved with 2000 degree ceramic fiber and stainless steel wool packed free flow mufflers. This unique exhaust configures a dual-tone setup controlled by a key fob which you can switch on the fly. Direct replacement for the factory mufflers and will work with the stock catalytic converters or any aftermarket sport cats designed to fit with OEM exhaust systems Superb sports car sound, throaty and deep with the valves opened, but docile with the valves closed.