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Exterior Components› Body Panels and Components

Bayson R Motorsports

GT4 Style Rear Diffuser

Name: GT4 Style Rear Diffuser
Brand: Bayson R Motorsports
SKU: PDC-RDF-POR718-P-GT4-1

$300.00

SKU: PDC-RDF-POR718-P-GT4-1

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Bayson R Motorsports GT4 Style Rear Diffuser is an aftermarket exterior component designed to enhance aerodynamic efficiency. It optimizes airflow beneath the vehicle to reduce drag and improve stability at higher speeds. This diffuser also adds a sleek, aggressive look to the rear profile of your Porsche Boxster or Cayman (718).

Show original supplier description

The Bayson R Motorsports GT4 Style Rear Diffuser is an aftermarket component designed for the Porsche 718 Boxster and Cayman models from 2017-2025. This rear diffuser is expertly crafted to improve aerodynamic efficiency by optimizing airflow beneath the vehicle, which helps to reduce drag. Beyond its functional benefits, it significantly enhances the car's aesthetic appeal, adding a sleek and aggressive look to the rear profile for an elevated performance and style. The diffuser is constructed from Polypropylene PP material and comes in an unpainted raw black finish, requiring prepping for paint. The product includes installation hardware, though installation instructions are not provided. Professional installation is highly recommended.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Bayson R Motorsports
Part Number	PDC-RDF-POR718-P-GT4-1
Category	Exterior Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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