Introducing the new aFe Power MACH Force XP cat back exhaust system for the 07 - 13 BMW 328i E92 E93 non - turbo. In recent testing, this system produced 4 horsepower and 8 lbs. x ft. of torque. This exhaust is constructed from 2.5in. brushed finish, mandrel bent, 304 stainless steel and is TIG - welded. A high flow, 304 stainless steel, single in dual o ut muffler was used to maximize performance across the power band while maintaining a great tone. To finish off this exhaust are dual, aFe laser etched, 3in. polished 304 stainless steel tips. This exhaust uses all factory hanger locations. Note Cutting is required and should be performed by a skilled technician.