A very popular upgrade made by 2015 Mustang GT and V6 performance enthusiasts is to bolt on a set of aftermarket Mustang shorty headers. 2015 Mustang shorty headers are designed as direct fit replacements and work with all stock and aftermarket exhaust system components. Available in several finishes, including chrome, silver ceramic coating or stainless steel. They will all add horsepower and torque to your Mustang by drastically reducing backpressure caused by the factory manifolds.