Designed specifically for the 2015-2018 Eco Boost Mustang this 3" Off Road Downpipe is constructed of 16 gauge mandrel bent 409 stainless steel and will boost horsepower and sound from the already stout Eco Boost platform. This kit is a true bolt on installation and comes complete with all necessary hardware. Like all Pypes products it's backed by our lifetime warranty. Intended for off road and racing applications only. The use of an aftermarket tuning device is mandatory.