The 911 R rear underbody diffuser is now available as a retrofit for the 991 GT3 and GT3 RS! We have tested this on a 2015 991 GT3 and it looks incredible. Several in stock and ready to ship out!

Porsche 991 R Rear Diffuser - Suncoast Parts!


Redeveloped engine underbody paneling with an increased surface area compared to the 911 GT3, as well as four additional fins.

Made of stamped aluminum and shaped so that it rises toward the rear. It thus fulfills the function of a diffuser and ensures downforce. The four plastic fins channel the airflow under the rear, further accelerating the airflow and increasing the diffuser effect.

A direct fit for 2014-2016 GT3 & GT3 RS models, but minor modifications could be required to match openings on the original engine cover. Due to the aggressive aerodynamic effects caused by this product, consult a race specialist to ensure aerodynamics are balanced for high speed or race applications.

Not compatible with standard 911 models.