MOSHAMMER GTS REAR DIFFUSER FOR PORSCHE 718 CAYMAN & BOXSTER
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Moshammer GTS Rear Diffuser for 982 Porsche 718 Cayman & Boxster
Moshammer GTS Rear Diffuser addresses the one place a 718 Cayman or Boxster looks unresolved, the plain expanse beneath the rear bumper. Moshammer’s Berlin workshop shaped this add-on for cars wearing the Sport Design or GTS rear treatment, so its outer edges follow lines already present on the car instead of arguing with them. Aerodynamically it earns its place, working the air leaving the underbody, and visually it reads as an OEM+ design element rather than an accessory. It ships unpainted with mounting material and a TUV parts certificate (§19.3), and it bonds into position with a special adhesive. On a mid-engined Porsche this deliberately understated, it is the kind of change owners notice immediately and everyone else simply feels.
Design and Proportion
- A 718 is a compact, tightly drawn car, so a rear diffuser has to be judged in millimeters rather than inches. Moshammer developed this one around the Sport Design and GTS bumper aperture, giving the lower rear the structure the standard flat surface lacks. The result is a rear that looks finished rather than modified, which is the whole ambition of OEM+ refinement.
Aerodynamic Function
- The profile is shaped to give the air leaving the underbody a defined exit rather than letting it spill out at the bumper edge. That is the functional half of the part, and it is the reason Moshammer describes it as delivering optimal aerodynamic properties instead of calling it trim. Nothing about the installation compromises the standard bodywork.
Supplied Unpainted
- The diffuser arrives unpainted, which is the deliberate choice of a manufacturer that expects the part to be finished properly. Owners commonly specify satin black, gloss black, or a match to the car’s color code, and each reads quite differently on a 718. Mounting material comes in the box and the component is installed with a special adhesive.
Features
- Bonded into place with a special adhesive
- Delivered unpainted for a body shop finish
- Distinct rear identity without altering the car’s silhouette
- Made to order in Berlin in small batches
- Mounting material included in the delivery
- OEM+ design language rather than aftermarket styling
- Shaped to work the air leaving the rear underbody
- Single-piece molding requiring no bumper cutting
- Supplied with TUV parts certificate (§19.3)
Applications
- Porsche 718 Boxster: 982 | 2017-present
- Porsche 718 Boxster GTS: 982 | 2017-present
- Porsche 718 Boxster S: 982 | 2017-present
- Porsche 718 Boxster T: 982 | 2017-present
- Porsche 718 Cayman: 982 | 2017-present
- Porsche 718 Cayman GTS: 982 | 2017-present
- Porsche 718 Cayman S: 982 | 2017-present
- Porsche 718 Cayman T: 982 | 2017-present
Notes
- Moshammer parts ship directly from Germany. Import taxes, duties, and tariffs may apply upon delivery and are the responsibility of the buyer. These fees are neither collected nor paid by Bulletproof Automotive.
- Moshammer products are not eligible for return
- Supplied unpainted. Budget for paint or a satin finish with your body shop before installation.
- Developed for the Sport Design and GTS rear bumper only. Cars with the standard rear bumper, the GT4 and the GTS 4.0 are not covered.
- Made to order in Berlin, so allow production time on top of shipping, contact us for the current lead time
- Installation is by special adhesive and is best carried out by a professional
Frequently Asked Questions
- Will the Moshammer GTS Rear Diffuser fit my 718 with the standard rear bumper? No. The Moshammer GTS Rear Diffuser was developed for the Sport Design and GTS rear bumper, where the lower aperture is a different shape. Cars with the standard bumper, the GT4 and the GTS 4.0 are not covered.
- Does it suit both Cayman and Boxster? Yes. The Moshammer GTS Rear Diffuser covers both body styles, including T and S cars, as long as the Sport Design or GTS rear bumper is fitted.
- What finish should I choose? The Moshammer GTS Rear Diffuser arrives unpainted, so the decision is yours. Satin or gloss black keeps the rear visually low, while a color code match makes the diffuser read as original bodywork.
- How is the Moshammer GTS Rear Diffuser installed? It is a single-piece molding that bonds into place with a special adhesive, and the mounting material is supplied in the box. No cutting of the rear bumper is required, though the work is best carried out by a professional.
- Is the certification included? Yes. Moshammer supplies this diffuser with a TUV parts certificate (§19.3), which documents the part for road use in Germany.
About Moshammer
Moshammer Automotive is a Berlin-based manufacturer of OEM+ aerodynamic refinement for Porsche, with a smaller line for Mini, Audi, BMW, and Mercedes-Benz. The house style is restraint with intent: parts drawn to look as though the factory had gone one step further, developed against original mounting points, TUV-documented where German road use demands it, and produced in small batches rather than stocked in volume. Their catalog spans single accents such as vent grills and wing end blades through complete Downforce and Tradition RS aero programs, alongside a range of multipiece forged wheels made to order in any size, width, and finish.
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We want you to feel confident before making your purchase. Here are a few important details to help you better understand this product and how it fits into your space.
- Please review the product dimensions carefully to ensure the right fit for your space
- Color may vary slightly due to lighting and screen settings
- Materials and finishes are selected for both durability and visual appeal
- Some items may require simple assembly upon delivery
- Perfect for both everyday use and long-term comfort
If you have any questions about this product, feel free to reach out to our support team. We're here to help you make the right choice.
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Product Size Guide
Please refer to the general size reference below to better understand how this product may fit into your space. Dimensions may vary slightly depending on the design and materials.
| Category | Small | Medium | Large |
|---|---|---|---|
| Decor & Accessories | Up to 10″ | 10″ – 20″ | 20″+ |
| Tables | Up to 30″ | 30″ – 60″ | 60″+ |
| Seating | 1 Seater | 2–3 Seater | 4+ Seater |
| Storage Units | Compact | Standard | Large Capacity |
| Lighting | Small Fixture | Standard Fixture | Large Fixture |
Note: For exact product dimensions, please refer to the specifications section above. This guide is intended as a general reference only.
MOSHAMMER GTS REAR DIFFUSER FOR PORSCHE 718 CAYMAN & BOXSTER
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