APR Performance Porsche 991.1 GT3 Rear Diffuser 2013-2015

This APR Performance rear aerodynamic component is application specific. Confirm the exact vehicle, trim, bumper and exhaust configuration, mounting points, finish, and included hardware before ordering.

Key Features

• Because a car displaces air as it moves forward, the air molecules in the rear of the car get disrupted causing a vacuum of low pressure air.
• To help channel the high speed air flow coming from underneath the car, diffusers redirects the high speed air flow to transition smoothly transition into the low pressure vacuum in the rear.
• This encourages a smoother flowing air flow underneath the car and allows better performance from other aerodynamic components such as aerodynamic wings.

Fitment

Specifications

What’s Included

The new APR Performance product in the exact variant, finish, size, and quantity selected on this page. Hardware and supporting components are included only when expressly stated for that configuration.

Brand Information

APR Performance develops application-specific aerodynamic and composite components for performance vehicles. Vehicle fitment, dimensions, material, finish, mounting, and included hardware remain exact-part and selected-variant specific.

Related Parts

• APR Performance Parts
• Carbon Fiber Parts
• APR Performance Porsche 991.1 GT3 Front Air Dam/ Lip 2013-2015
• APR Performance Porsche 991.1 GT3 Front Bumper Canards 2013-2015

Frequently Asked Questions

Will this diffuser clear my exhaust system?
Confirm the exact rear bumper, exhaust outlet location, tip size, valance, sensors, and every stated exclusion before ordering.

Should the part be test-fitted before finishing or installation?
Yes. Inspect and test-fit the component, mounting points, panel gaps, and surrounding clearances before drilling, coating, or permanent installation.

Is professional installation recommended?
Professional installation is recommended for structural aerodynamic parts, composite body components, alignment-sensitive panels, and any installation requiring drilling or modification.

Installation

1. Confirm the exact part number, selected variant, vehicle configuration, mounting interface, and included components before altering the vehicle.
2. Inspect and test-fit every mounting point, panel gap, and surrounding clearance before drilling, coating, or permanent installation.
3. Install with the specified supports, fasteners, attachment method, and professional alignment procedures for the exact product.
4. Recheck clearance, fasteners, panel security, and any adjustable aerodynamic setting after the initial operating cycles.