Milltek S550 GT Catback 2015-17

They have brought a panoply of options for the Mustang owner, both GT V8 and Ecoboost, with dual or quad tip options, (Quad requires Roush rear valance- available separately), a variety of tip finishes and resonated or non-resonated systems (non-resonated systems are louder and are equivalent to the US "competition" systems, where resonated would be a "street" system" Milltek non resonated systems feature an X pipe.)

Note the Milltek Mustang Resonated Systems ARE Approved for EC use.

Across both dual and quad outlet systems trims are available in a number of finishes from polished stainless, cerakote black, brushed titanium or the new burnt titanium finish.