AWE SwitchPath™ Exhaust for W213 AMG E63/S Sedan / Wagon (for AMG Performance Exhaust Cars)3025 31044 Heavy tones for the Mercedes heavy hitter: Proudly engineered, designed, tested, and manufactured in house at AWE Peak power gains of 23 hp, 7 ft lbs of torque, and max power gains of 35 hp @6300 rpm, 53 ft lbs of torque @ 3000 rpm at the crank Easy options for cars with and without AMG Performance Exhausts Features a precision valved H pipe for deep muscle tone Handcrafted from dual 3 diameter . 065 wall U. S. sourced CNC mandrel bent