Note-This sale is just for the Diffuser and fins and not the bottom bumper. This Diffuser is made of 6mm Poly Metal. Comes in Satin Black on all sides and the Hardware and Instructions are included for an easy install. Made in the USA! These are in stock and we ship Fast! FITMENT- Ford Mustang 2015-17 all models. Note- this does not fit the GT-350 bumper.