Borla Rear Underbody Diffuser

This rear diffuser is intended to provide a flat surface where the OEM muffler used to be, once you have installed a Borla no-muffler exhaust system.  Fits with the Borla cat-back; may fit with other no-muffler rear exhausts. Will NOT fit with stock system.

Includes diffuser and mounting hardware.  Fits all BRZ/FR-S.