A rear diffuser is the finishing touch that pulls a Porsche 991’s rear end together. This polyurethane diffuser gives the 2012–2016 991.1 Carrera a clean, motorsport-inspired look while improving airflow exiting the underbody.
What is the 991.1 rear diffuser?
It’s a rear bumper diffuser that adds purposeful, GT-style detailing to the lower rear of the car — a subtle but effective way to modernize and sharpen the 991’s rear.
Why polyurethane?
Molded from flexible, crack-resistant polyurethane, it flexes over impacts and returns to shape rather than cracking like fiberglass. It arrives ready for scuff, prime, and paint.
Fitment
Fits the Porsche 911 991.1 Carrera (2012–2016). Confirm your rear bumper and exhaust configuration before ordering.
Installation tips
The diffuser uses OEM-style mounting points and includes hardware. DIY installation is achievable; professional fitment ensures the best alignment and finish.
Styling and performance
The diffuser cleans up underbody airflow for added rear stability while giving the car a more aggressive look. Pair it with a front lip and side skirts to complete a balanced aero package.
FAQ
What’s the difference from other 991 diffusers? This listing covers 2012–2016 fitment — confirm your exact year and bumper before ordering.
Will it crack? Polyurethane flexes and resists cracking under normal use.
Finish your 991’s rear
Add a clean motorsport rear end. Shop the Porsche 991.1 Rear Diffuser here.