2024+ Ford Mustang S650 GT Performance Pack Rear Diffuser – Stealth Style Quad Tip Aero Diffuser

Enhance the aerodynamics and aggressive styling of your 2024+ Ford Mustang S650 GT Performance Pack with this Stealth Rear Diffuser designed for quad-tip exhaust models. Engineered to improve airflow under the vehicle, this diffuser helps manage air exiting from the differential area to the rear of the car while giving the Mustang a more track-inspired appearance.

Unlike purely cosmetic diffusers, this design incorporates a functional aluminum belly pan that helps smooth and direct airflow under the vehicle. The aerodynamic panel works together with durable HDPE diffuser fins to properly diffuse air as it exits the rear of the car.

This diffuser installs as an add-on to the factory rear valance, maintaining a clean OEM-style fit while significantly enhancing the rear-end appearance of the Mustang.

Manufactured in the USA, this diffuser is available in one-piece or three-piece configurations depending on your installation preference.

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Features

• Designed specifically for 2024–2025 Ford Mustang S650 GT Performance Pack
• Compatible with quad-tip exhaust systems
• Functional aerodynamic design to improve rear airflow
• HDPE diffuser fins and panels with automotive-grade finish
• Integrated aluminum belly pan for airflow management
• Available in one-piece or three-piece configurations
• Installs as an add-on to the factory rear valance
• Made in the USA

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Product Finish Options

Standard Aluminum
Includes HDPE diffuser panel and fins with a raw aluminum attachment plate.

Black Powder-Coated Aluminum
Includes HDPE diffuser panel and fins with a black powder-coated aluminum attachment plate for a stealth appearance.

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Vehicle Fitment

Compatible with:

• 2024 Ford Mustang GT Performance Pack
• 2025 Ford Mustang GT Performance Pack

Not compatible with Mustang Dark Horse

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Installation

The diffuser mounts to the factory rear valance and uses most of the existing mounting points.

• The Performance Pack version uses two fewer mounting bolts on the main panel
• Remaining installation steps follow the standard diffuser installation process
• Diffuser fins ship unassembled to reduce shipping size and cost
• A Phillips screwdriver or drill is required to attach the fins to the main panel
• Pre-drilled holes are included to simplify alignment

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Shipping & Lead Time

This product is built to order.

• Standard aluminum version: approximately 5–7 business days before shipping
• Black powder-coated version: approximately 7–10 business days before shipping

*Note:

• The aluminum that attaches the diffuser to the car is NOT a fine finished piece, it will have fine marks and scratches obtained during manufacturing. This part of the diffuser is not viewable when the car is sitting on the ground. 
• The primary diffuser fins will ship unattached due to sizing and shipping rates, a Philips head screw drive or drill will be needed to assemble just the fins to the main panel. Holes are already in place to line the product up. 
  

Install Guide:

• The Mustang GT Performance Pack diffuser will use 2 less bolts for the install on the main panel. The remainder of the install is the same as the video posted below. 

Main Panel:

Side Extensions:

Same Process as the 18-23 variant seen below.