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SpeedForm GT/CS Style Rear Spoiler; Unpainted (15-20 Fastback)

Item 394042-00
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Market Price $359.99 You Save 10% ($35.00)
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$324.99 (each)

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      Product Information

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


      • Bold Modern California Special Styling
      • Durable, Lightweight ABS Construction
      • Simple Installation - Drilling Required
      • Ships Unpainted
      • Fits All 2015-2020 Fastback Mustangs


      Pre-Painted Mustang Rear Spoiler

      GT/CS Style Spoiler. Add the bold signature styling of the GT/CS Mustang to your very own 2015-2020 with this great looking Rear Pedestal Style Spoiler from SpeedForm. This GT/CS Style Spoiler ships unpainted, so you can customize it however you like - and it is also available pre-painted in 2015-2020 factory colors. So, if you're seeking a timeless, classic look for your S550 Mustang, this California Special Rear Spoiler is just what you need.

      Superior Quality. Constructed from one-piece blow molded acrylonitrile butadiene styrene (ABS) material, this California Special Style Rear Spoiler is lightweight and extremely durable. Unlike some other rear wing options on the market, this GT/CS Style Spoiler won't chip or crack like fiberglass and will last for many years to come.

      Drilling Required. This SpeedForm GT/CS Pedestal Style Spoiler will require drilling into the deck lid for installation. Drilling templates and all the necessary hardware is included. If your Mustang is equipped with a factory spoiler, the original holes will be exposed after installing this GT/CS Style Wing.

      Application. This Unpainted SpeedForm GT/CS Style Rear Spoiler is designed to fit all 2015-2020 Fastback Mustangs, including the V6, EcoBoost, GT, GT350 and GT500 models.

      Technical Notes. This SpeedForm Rear Spoiler ships unpainted. AmericanMuscle recommends professional installation of all body parts. We also recommend test fitting these products before they are painted.


      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# 394042-00

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (2)

      Write a Review

      Ratings Summary

      4.5 out of 5 overall rating from 2 customers

      Installation Time: Weekend

      • January 13, 2019

        5 2017 EcoBoost - JoeS Installation Time: Shop Install

        Rear Spoileer

        Shipped quick. I had the spoiler installed and painted when the drivers side was repainted for a perfect match and installation.

        Helpful (2)
      • February 23, 2018

        4 2016 GT - RubyRedGT Installation Time: Afternoon

        Fantastic way to finish off the back of your car

        Give your non California special S550 that CS feel. Lightweight ABS is paintable and wrapable. Won't chip or crack like the fiberglass alternatives. Install using factory holes plus a few additional for the rental pedestal

        Helpful (5)

      Questions & Answers (5 answers)

      5 Top Rated Questions

      Will this spoiler reuse the same holes from the stock decklid spoiler on a 2015 fastback?

      • It will not reuse factory spoiler holes, and drilling is required.

      Helpful (0)

      By unpainted do you mean primed or does it come black?

      • Unpainted means the product will be sent it its raw material form which means there is no primer or paint laid on the product.

      Helpful (0)

      This is confusing. You say it will fit a convertible AND that it will not!! I have a 2017 GT convertible, will it fit my car?

      • The SpeedForm GT/CS Style Rear Spoiler will not fit the convertible model Mustangs. The SpeedForm GT/CS Style Rear Spoiler is only able to be installed on the Fastback 15'-18' Mustangs.

      Helpful (0)

      Hello, what spoiler will fit on a mustang GT convertible 2015 because a lot of your spoiler does't fit for convertible ?

      • The GT/CS Style Rear Spoiler will work with a convertible model.

      Helpful (0)

      Will I it fit a 2018 GT convertible?

      • The GT/CS Style Rear Spoiler, Will not fit the convertible models and is intended for the fastbacks.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Rear Spoiler
      • Templates
      • Installation Hardware

      Will It Fit My Mustang

      • Bullitt - 19, 20
      • EcoBoost - 15, 16, 17, 18, 19, 20
      • GT - 15, 16, 17, 18, 19, 20
      • GT350 - 15, 16, 17, 18, 19, 20
      • GT350R - 15, 16, 17, 18, 19, 20
      • GT500 - 20
      • V6 - 15, 16, 17