For the Porsche 911 Turbo (991.2 generation, 2017–2019), the rear bumper and apron represent one of the most complex exterior assemblies on the car. Because the Turbo is a wide-body car with active aerodynamics, the bumper is far more than just a plastic shell—it is a functional component that manages engine cooling and downforce.

1. 991.1 vs. 991.2: Key Design Differences

If you are looking for a replacement or a facelift upgrade, the 991.2 (Gen 2) rear bumper has distinct visual and functional changes:

• Air Outlets: The 991.2 Turbo features significantly larger side air outlets (exhaust vents for the intercoolers) compared to the 991.1.

• Reflector Strips: On the 991.2, the slim red reflector strips are moved higher and integrated more fluidly into the bumper’s character line.

• License Plate Recess: The indentation for the license plate is more pronounced and “sharper” in the 991.2 design.

• Intercooler Air Intake: The 991.2 Turbo introduced a revised engine lid with vertical slats that feed air into the bumper-mounted intercoolers differently than the 991.1.

2. Technical Specifications & Components

The “Rear Bumper” is actually an assembly of several parts. When buying used, ensure you know what is included:

• Upper Bumper Shell (Main Cover): Part number 991.505.411.13 (Base).

• The Rear Apron (Lower Diffuser): This is the bottom section that surrounds the exhaust tips. For the Turbo, this is often finished in High Gloss Black or carbon fiber.

• Active Aero Spoiler: The rear bumper integrates with the retractable wing mechanism.

• Exhaust Outlets: The 991.2 Turbo S typically features Quad trapezoidal tips, whereas standard Turbos may have different finishes.

3. Options & PR-Codes

When ordering parts, you must match your vehicle’s specific option codes:

• PXUE: Rear apron painted in exterior color.

• P636/P638: Includes cutouts for ParkAssist (Front/Rear) and the Reversing Camera.

• PXAF (Turbo Aerokit): Features a more aggressive lower diffuser and a larger, fixed-wing profile.