2024+ Mustang S650 GT & EcoBoost Rear Diffuser – Stealth Aero Diffuser (Dual or Quad Exhaust)

Enhance the rear styling and aerodynamic performance of your 2024–2025 Ford Mustang S650 GT or EcoBoost with this Stealth Rear Diffuser designed for both dual and quad exhaust configurations. This diffuser delivers a more aggressive rear-end appearance while also improving airflow management underneath the vehicle.

Unlike purely cosmetic diffusers, this design incorporates a functional aluminum belly pan that helps smooth and direct air as it exits from beneath the vehicle. The airflow is then managed through durable HDPE diffuser fins, helping reduce turbulence while giving the Mustang a race-inspired aesthetic.

The diffuser mounts directly to the factory rear valance, making it an excellent upgrade for owners looking to add performance styling without replacing the entire bumper.

Manufactured in the USA, this diffuser is available in one-piece or three-piece configurations to accommodate different installation preferences.

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Features

• Designed for 2024–2025 Ford Mustang S650 GT & EcoBoost

• Compatible with dual or quad exhaust configurations

• Functional aerodynamic design to improve airflow under the vehicle

• HDPE diffuser panel and fins with automotive-grade finish

• Integrated aluminum belly pan for airflow smoothing

• Installs as an add-on to the factory rear valance

• Available in one-piece or three-piece design

• 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
  
• 2024+ Ford Mustang EcoBoost
  

Exhaust Options:

• Dual exhaust
• Quad exhaust

Not compatible with Mustang Dark Horse

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Shipping & Lead Time

This product is built to order.

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

*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 Quad Exhaust setup 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.