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RTR Rear Diffuser (18-23 GT; 19-23 EcoBoost w/ Active Exhaust)

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Product Information

  • RTR Aggressive Track Inspired Styling
  • Durable Injection Molded TPO Material
  • Features a Grained Texture
  • Straight Forward Installation - Cutting is Required
  • Sold as a Pair; Driver and Passenger Side Included
  • Fits 2018 - 2023 GT Mustang Models with Dual Quad Exhaust

Modern Aggressive RTR Styling

Add an aggressive track inspired appearance to your GT Mustang with the same exact Rear Diffuser that is featured as original equipment on the 2018 - 2023 Mustang RTR. Designed and developed in conjunction with Vaughn Gittin Jr., this RTR Diffuser was designed to offer a tastefully more pronounced Rear diffuser for those who want a bit more in comparison to the subtle factory rear diffuser.

High-Quality TPO Construction

RTR manufactures its Rear Diffuser from an injection molded thermal plastic olefin (TPO) material using the original OEM CAD data from Ford to ensure a perfect fit. TPO is an extremely strong material known for its light-weight, superior durability, and impact resistance - making it perfect to withstand the hazards of daily driving. This Rear Diffuser is completed in a fine-grained stippled texture for a factory look that helps to hide the appearance of rock and stone impacts.

Straight Forward Installation

Installation of the RTR Rear Diffuser is simple and straight forward. The Diffuser installs easily with a combination of hardware and 3M automotive bonding tape. However, it will require permanent modification to the stock rear bumper cover to remove a section of the factory diffuser. Installation can be completed in about two hours.


This RTR Rear Diffuser is designed to fit the 2018 - 2023 Ford GT Mustang models equipped with dual quad exhaust tips only. Driver and passenger side Diffusers are included.

What's in the Box:

  • (1) Driver / Left Side Rear Diffuser
  • (1) Passenger / Right Side Rear Diffuser
  • (2) Diffuser Brackets
  • (4) 5mm x 10mm Short Screws
  • (2) 5mm x 20mm Long Screws
  • (4) 5mm Washers
  • (1) Adhesion Promoter

Installation Time: (approx) 2 Hours

Difficulty Level:Light to Moderate mechanical skill required

Customer Reviews
5.0 Based on 7 Reviews
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    United States United States


    Definitely makes my rear valance stand out and look more aggressive

    Patrick Z.
    United States United States

    18’ RTR rear diffuser

    Look at it!

    RTR Vehicles RTR Rear Diffuser (18-23 GT; 19-23 EcoBoost w/ Active Exhaust) Review
    Patrick Z.
    United States United States


    Overall the install was very simple to accomplish. I was having trouble keeping the bracket in place after hand tightening it to grab under the valance so I installed it a different way, a little more tedious to line up but operates and looks the same exact way. Perfect amount of aggression without being too extra imo

    United States United States

    Awesome Diffuser

    The diffuser itself was really simple to install if you follow the guides, used an air saw to cut the factory fins off and the brackets are self tappers into the diffuser so you will want to thread them in but not all the way. Great product!

    Jordan S.
    United States United States

    If You’re Thinking about it, Do It

    I feel like a parent at Thanksgiving. A kid points at the Cranberry sauce and asks “Is this Good?” And I would respond “No it’s terrible!” Securing more for myself. While I’d love to leave a 1 Star Review so my Pony looks as unique as possible for as long as possible I can’t in good conscience. The truth is this is worth every dollar. It shipped INCREDIBLY fast (AND around the Holidays). It was packaged great, and the diffuser pieces and hardware were great quality. Install really was as simple as it seems. (About 30 minutes) the toughest part was keeping the sticky strips from sticking before it was in its final position but even that wasn’t hard thanks to the screws helping push it in the right direction. My rear end is so much meaner and I’m even more in love with my car. 100% recommend. Good job RTR!

    RTR Vehicles RTR Rear Diffuser (18-23 GT; 19-23 EcoBoost w/ Active Exhaust) ReviewRTR Vehicles RTR Rear Diffuser (18-23 GT; 19-23 EcoBoost w/ Active Exhaust) Review

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