aFe is proud to introduce the aFe dual cat-back exhaust system. In recent testing this aFe cat-back exhaust system produced 34 horsepower and 43 lbs. x ft. of torque, furthermore, weighs 20 lbs. less than the stock exhaust. With the iconic 911 already a well-engineered performance driving machine, aFe developed the perfect balance of pure, race-inspired performance while ensuring that perfect sound decibel and exhaust note creates the ultimate driving experience. Starting with a CAD X-Pipe, aFe spent countless hours of R&D to ensure that the volume, flow and balance was no less than perfect. Also, aFes unique brushed finish step mid pipe design unleashes all available power and creates a broad and exciting power band. Included are dual 304 stainless steel light-weight race mufflers and resonators, this straight through design eliminates any restriction and optimizes maximum power and performance with no compromise. Available with 3-1/2 IN polished 304 stainless steel quad tips and CNC-Machined laser-etched tip inserts, this system is hand-crafted and TIG-welded for a perfect, precise fit and 100% complete bolt-on installation. No modifications necessary.