Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $6,000 In Store Credit Enter Now

MMD by FOOSE Rear Diffuser Fins; Pre-Painted (18-20 GT; 19-20 EcoBoost w/ Active Exhaust)

Item 406534
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $137.99 You Save 52% ($72.00)
Starting At


FREE Shipping

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.
Choose options to add to cart.
    Create a list
    Add to New List

    Saved - View your saved items

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

      Product Information

      Features, Description, Specs & Installation


      • Matches 2018-2020 Factory Mustang Colors
      • Painted Right Here at AmericanMuscle!
      • Rear Diffuser Fins
      • Designed by Chip Foose
      • Track Inspired Styling
      • Durable, Lightweight ABS Construction
      • Simple Installation - Drilling Required
      • Sold as a Pair; Driver and Passenger Side Included
      • Fits 2018-2020 GT Mustang Models


      Track Inspired Styling by FOOSE. A set of Pre-Painted MMD by FOOSE Rear Diffuser Fins are a simple and effective way to add bold, track inspired styling to your S550 Mustang. Designed by renowned custom car builder Chip Foose, these Rear Diffuser Fins will add an intimidating appearance to the rear end of your 2018-2020 GT Mustang.

      Painted Here to Match 2018-2020 Factory Mustang Colors. These MMD by FOOSE Rear Diffuser Fins are painted right here, at AmericanMuscle headquarters in our state of the art paint booth. Utilizing the same base coat clear coat urethane paint Ford used on the exterior of your 2018-2020 Mustang, these Diffuser Fins will match your stock color perfectly.

      High Quality Construction. MMD by FOOSE manufactures their Rear Diffuser Fins from an acrylonitrile butadiene styrene (ABS) material using the original OEM CAD data from Ford to ensure a perfect fit. ABS 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.

      Simple Installation. MMD by FOOSE designed their Rear Diffuser Fins to install simply with the supplied push clips and 3M doubled sided automotive bonding tape. Drilling four 1/4-inch holes into your Mustang's rear lower bumper cover is required for installation. Installation can be completed in less than 30 minutes.

      Application. These Pre-Painted MMD by FOOSE Rear Diffuser Fins are designed to fit 2018-2020 GT and EcoBoost Mustang models with quad exhaust and the factory rear diffuser installed. Driver and passenger side Fins are included.

      Find Your Paint Code

      • Choose the year of your Mustang from the options above. The color choices displayed will be the only exterior paint colors available for your year Mustang. The first two letters for each color option are the paint code for your exterior color.
      • If you need to verify your paint code, look inside the door jam of your driver's side door at your VIN plate to find your exterior paint code.
      • These Diffuser Fins are also available Unpainted for those who like to do-it-yourself.

      MMD by FOOSE

      Fitment: 2018 2019 2020 Details

      MMD by FOOSE 406534-AJ












      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Rear Diffuser Fins
      • (4) Push Clips
      • (1) 40-inch Roll 3m Tape
      • (2) Alcohol Pads
      • (2) Adhesive Promoter Pads

      Customer Reviews (9)

        Reviews of MMD by FOOSE Exterior products have an average rating of 4.5 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • EcoBoost - 19, 20
          • GT - 18, 19, 20