Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
1-877-887-1105
Every day 8:30AM EST - 11:00PM EST
Win 1 of 3 Exhaust Kits! Enter Daily!

RTR Rear Diffuser (18-19 GT)

Market Price $349.99 You Save 14% ($50.00)
Starting At

$299.99 (pair)

FREE Shipping

  • Item 403279

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.

Will this fit your Vehicle?

In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • 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 2018-2019 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 2018-2019 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 their 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.

    Application. This RTR Rear Diffuser is designed to fit 2018-2019 Ford GT Mustang models equipped with dual quad exhaust tips only. Driver and passenger side Diffusers are included.

    Fitment: 2018 2019 Details

    CA Residents: Warning: California's Proposition 65

    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 Info
    Will it fit my Mustang?

    You Might Also Like

    Customer Photos

    Questions & Answers (1)

    1 Top Rated Question

    Will the Roush valence aero foil kit fit perfectly with this diffuser design?

    • Unfortunately, the Roush rear valance aero foil kit will not fit properly with this RTR rear diffuser product due to this part interfering with the install of the Roush kit.

    Helpful (0)
    Post Your Question

    People Who Bought This Item Also Bought

    Customer Reviews (1) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Less than 1 Hour

    • Fit 4 4
    • Appearance 5 5
    • Bang For Your Buck 4 4



    • 5/5

      Installation Time: Less than 1 Hour

      September 03, 2018

      Amazing product

      The diffuser just went in perfect and I did not have any problems putting it on, and it looks amazing.

      GeevanT

      Year: 2018 Submodel: GT

      Helpful (1)

    Related Mustang Categories