If you're a 2013 - 2018 Ford Focus ST owner who loves high - octane driving on the track or just wants to make a statement on the streets, this exhaust is for you. It has a full 3 - inch diameter configuration, and the 4 - inch slash - cut tips with double - walling ensure a great look even after hard use. The exhaust provides a raw and rowdy sound in the mid - range, adding a new level of excitement to your drives.