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Trufiber Carbon Fiber Rear Diffuser Trim (15-17 GT Premium, EcoBoost Premium)

Item 392998
AmericanMuscle no longer carries the Trufiber Carbon Fiber Rear Diffuser Trim (15-17 GT Premium, EcoBoost Premium). Please check out Mustang Rear Diffusers & Valances for an updated selection.
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    Product Information

    Features, Description, Reviews, Q&A, Specs & Installation


    • Show Quality Finish
    • Trim Surrounding Rear Diffuser
    • Infused Real Carbon Fiber
    • Clear Coat Finish with UV Protection
    • 3K, 2x2 Twill Weave Design
    • Paintable
    • Direct Replacement
    • Fits 2015-2017 Premium Pack GT and EcoBoost Mustangs
    • Designed for Premium Chassis Packages Only (Trim Levels: 200A/201A/400A/401A)


    Get Noticed. With the over abundant use of black plastic trim on modern day vehicles, it leaves most car enthusiasts hoping there are aftermarket options to choose from. Leave it to Trufiber to bring you a show stopping carbon fiber upgrade for your Premium S550's Rear Diffuser. Designed as a direct replacement, you can change the rear of your 2015-2017 Mustang from drab to fab in no time. With the trim extending over the exhaust outlets and around the center diffuser, it will add a subtle yet killer appearance to really get you noticed. Combine this with Trufiber's CF Rear Diffuser (sold separately) for a complete overhaul and bring your upgrade full circle.

    Real Vacuum Infused Carbon Fiber. This one piece Trufiber Rear Diffuser Trim features an amazing 3K, 2x2 Twill Weave design that has been made out of real, vacuum infused carbon fiber. Finished off with a clear coat that incorporates UV protection for superior defense against Mother Nature, this trim will certainly improve the rear styling of your Mustang. This diffuser trim can also be painted at your local shop for a more personalized splash of color out back.

    Easy Installation. This high quality Carbon Fiber Rear Bumper Trim is crafted to be a direct fit replacement of your factory Premium Pack diffuser trim and will utilize the stock hardware. Adding some personalization to the rear of your S550 couldn't be any easier.

    Application. This Trufiber Carbon Fiber Rear Diffuser Trim is specifically designed for installation on the 2015-2017 GT and EcoBoost Mustangs equipped with the factory Premium Chassis Packages only (Trim Levels: 200A/201A/400A/401A).

    Freight Notes. Freight items can only be shipped within the continental 48 states, no expedited methods. What is freight shipping? Your Answers are Right Here!.

    Fitment: Details

    CA Residents: WARNING: Cancer and Reproductive Harm -


    Customer Reviews (7)

    Write a Review

    Ratings Summary

    4.6 out of 5 overall rating from 7 customers

    Installation Time: Afternoon

    • December 15, 2018

      5 2015 GT - JesusS Installation Time: Afternoon

      Fits like a glove

      the whole bumper needs to be removed, a little tricky, but after that, the diffuser fits in the right places and looks awesome, thanks American Muscle.

      Helpful (3)
    • May 15, 2018

      2 2016 GT - MarkH Installation Time: Afternoon


      I have purchased several CF pieces for my Mustang and the finish is always the same, smooth and glossy and looking great. However, this item shipped direct from manufacture and the finish on the piece is rough and has appearance like a sticker placed on original trim. Called AM but they could not help. I sent message to TruFiber on their website, since they have no phone number, and have been waiting a week for any kind of response. Probably the last TruFiber purchase for me.

      Helpful (10)
    • November 08, 2017

      5 2016 GT - RabidC Installation Time: Afternoon

      perfect fit and finish!

      This thing is a great addition for carbon fiber lovers! it pairs well with the side skirts and chin spoiler!

      Helpful (11)
    • September 10, 2017

      5 2015 GT - RickyH Installation Time: Afternoon

      Love that look

      Was a little tougher than the front peace. But all in all not too bad of an install.

      Helpful (10)
    • August 31, 2017

      5 2016 GT - Jangle Installation Time: Less than 1 Hour

      CF Diffuser

      Both the rear trim piece and diffuser in carbon fiber are quite simply a perfect fit and offer a stunning appearance to my 2016 GT. Thanks AM.

      Helpful (10)
    • February 07, 2017

      5 2017 GT - Chris Installation Time: Afternoon


      Terrific Quality Carbon Fiber Rear Diffuser. Looks great on my car. Took my vehicle to a few car meets and every Mustang owner there wanted to know where I bought my diffuser.

      Helpful (10)
    • May 26, 2016

      5 2016 V6 - stang


      it does upgrade from the base look. they install time didn't take too long.

      Helpful (10)

    Questions & Answers (3 answers)

    3 Top Rated Questions

    Is bumper removal required? Did one on my S197 but not sure about the S550 cars yet.

    • You will need to remove the bumper to install this diffuser trim.

    Helpful (0)

    Detail: Can I get wax on this, I want to change all my plastic trim to carbon so i can just wax my car and have to worry about taping the plastic and save time

    • Carbon fiber can be waxed, so you will not have any problems applying it.

    Helpful (0)

    Can I install it on my 2016 non premium mustang ecoboost?

    • The TruFiber Carbon Fiber Trim piece is designed to be a direct replacement of the plastic rear valance panel featured on the GT and EcoBoost Mustangs with the Premium Package Bumper. Unfortunately this trim piece will not fit on Non-Premium Bumpers

    Helpful (0)
    Post Your Question

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (1) Rear Diffuser Trim

    Tech Specs

    Will It Fit My Mustang

    • EcoBoost - 15, 16, 17
    • GT - 15, 16, 17

    Premium Chassis Packages Only (Trim Levels: 200A/201A/400A/401A)

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