2013-2016 Porsche Cayman GT4 981 AF-1 Front Lip Splitter ( GFK ) - 1 Piece - 117831
Part#: ed_117831
Aero Function
Information:
⚠️FIBERGLASS ➡ REQUIRES PREP WORK⚠️ SHIPS FROM USA
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Local pick-up available ONLY at:
Fullerton, CA
Introducing the GT4 981 AF-1 Rear Diffuser ( GFK ) for the 2013-2016 Porsche Cayman, a premium accessory from Aero Function designed to enhance the appearance and potentially improve the performance of your vehicle. This Diffusers is expertly engineered to complement the aerodynamic profile of your car, and add a sleek, aggressive appearance that accentuates the Porsche Cayman’s dynamic design.
The GT4 981 AF-1 Rear Diffuser ( GFK ) is engineered with precision to possibly deliver benefits that may enhance your driving experience.
The GT4 981 AF-1 Rear Diffuser ( GFK ) is constructed from lightweight FRP materials, minimizing any additional weight to your vehicle. The aerodynamic design may offer performance benefits.
The hardware needed to install this product is not included in the package. To ensure a secure and proper fit, you will likely need to acquire both OE Porsche Cayman and custom hardware, such as screws, bolts, and brackets, depending on your setup.
The GT4 981 AF-1 Rear Diffuser ( GFK ) offers a customizable finish that can be painted to match your vehicle’s color. This allows for a personalized touch that reflects your unique style.
Aero Function takes pride in the quality of its products, and the GT4 981 AF-1 Rear Diffuser ( GFK ) is no exception. Each unit undergoes testing to ensure it meets standards of performance.
If you’re looking to upgrade your Porsche Cayman, the GT4 981 AF-1 Rear Diffuser ( GFK ) from Aero Function is a great choice. It combines design and materials to enhance your Porsche Cayman.
Porsche DiffusersCayman DiffusersAero Function DiffusersPorsche FRP DiffusersCayman FRP Diffusers
New: A brand-new, unused, unopened, item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in our retail store. To be installed professionally by a bodyshop with a valid automotive repair business license. Fiberglass parts always require prep work before they can be primed and painted. This product is made with fiberglass material, therefore it will exhibit chips, breaks, cracks, waves, scratches and holes which require modification. It is necessary to dry fit and drill mounting holes and preform body work before paint. Cutting and adding of fiberglass may be required for proper fitment. Ships direct from the manufacturer or a distributor. Primer finish. Hand layup is the manufacturing process used for the majority of our fiberglass parts. Hoods require hood pins. We do not offer any guarantee of fitment on vehicles that have been in involved in accidents and/or have body damage or customization.











Aero Function diffusers are aftermarket aerodynamic accessories designed specifically for enhancing style and performance. These diffusers are not “direct bolt-on” parts and may require significant preparation, such as sanding, fitting, or custom bodywork. Common installation challenges can include potential warping, cracking, or fitment issues if the diffuser is not handled or installed correctly.
Aero Function diffusers are generally installed below the rear bumper, and in many cases, the bumper may need to be modified to ensure a proper fit. It’s important to select a diffuser that is compatible with specific bumpers, trims, or aftermarket styles to avoid fitment issues.
Separate mounting hardware, such as L-brackets, bolts, screws, washers, and fasteners, is typically required but not included in the package. L-brackets help attach the diffuser securely to the vehicle’s chassis or bumper, while additional supports may be needed depending on the design and fitment. Installers will need to source the necessary materials separately to ensure compatibility with both the diffuser and the vehicle.
For the best results, Aero Function recommends professional installation by a custom shop experienced in aftermarket accessories. Many standard auto repair shops may lack the expertise to handle the specific fitment and hardware requirements for these diffusers.
Please note that these diffusers are intended strictly for off-road and show use. Due to strict Department of Transportation (DOT) regulations, most Aero Function diffusers are not street-legal. Aero Function does not endorse or recommend using these diffusers on public roads or highways.
Items sold on this website may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.