The Milltek Sport Catback Exhaust System for the Ford Focus RS features mandrel bent, stainless steel piping for smooth, efficient exhaust flow. 3" diameter piping will open up flow a good deal and help increase horsepower and torque but allowing easier flow after the exhaust rushes out of the turbo. A rear mounted muffler maintains the stock style and will keep the exhaust at the perfect tone. This is more aggressive than stock but does not drone and sounds very crisp and aggressive at wide open throttle. The tips are 115mm in diameter and are angled for a nice and clean factory look. All hardware is included for a smooth installation. 4 different tip options are available as well as a resonated version.