Introducing the new aFe Power MACH Force XP Race Pipes for the 07-13 BMW 328i E92 & E93 non-turbo. These exhaust race pipes are constructed from 2.5in. brushed finish, mandrel bent, 304 stainless steel and are TIG-welded. While developing this system, we ensured that these aFe race pipes not only increased performance but delivered a powerful and aggressive tone. These race pipes are required to be used with aFe cat-back exhaust system P/N 49-36313.