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Roush Single Adjustable Coil-Over Kit (15-21 w/o MagneRide)

Item 389794
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      Video Review & Installation

      Hey guys, Stephanie with, here with my review and an install of the Roush Single Adjustable Coil Over Kit available for all 2015 and newer S550 Mustangs. In this video, we're gonna go over a few different topics with this coil over kit. But mostly, we're gonna talk about the performance abilities of the kit and the install. Gonna cover the install in more detail later, but I'll tell you right now that this install is straightforward but it is a little bit of work. So I'm gonna call it a two out of three wrenches in the difficulty meter.

      Product Information

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


      • Roush Performance Single Adjustable Coilover Kit
      • Improves Handling Performance
      • Perfect For Use On The Street Or The Track
      • Adjustable Ride Height: Front 0.8"-1.5"; Rear 1.0"-2.0"
      • Pre-Set Rebound and Compression
      • Progressive Rate Springs Included
      • Rated for producing over 1.0g lateral skid pad acceleration
      • Fits All 2015-2021 Mustangs without MagneRide Suspension


      Race-inspired Handling. Dramatically improve the handling performance of your S550 Mustang with a Roush Single Adjustable Coil Over Kit. This Roush Performance Coil Over Kit is designed to lower the center of gravity and reduce body roll for better handling that results in flat cornering and superior directional control — perfect for track days, autocross or a spirited drive down your favorite back road.

      Adjustable Ride Height. Lower your S550 Mustang's stance and center of gravity from 0.8" to 1.5" up front and 1.0" to 2.0" in the rear for drastically improved cornering and handling with this Roush Performance Coil Over Kit. The coil overs come set to a 1.5" drop in front and 1.0" drop in the rear, but can be adjusted with the included tools to the desired ride height.

      Pre-Set Damping. Roush Performance engineered their Single Adjustable Coil Over Kit with pre-configured damping and spring rates for the ultimate balance of comfort and sporty race-inspired driving straight out of the box. This Roush coil over kit has been rated at producing over 1.0g lateral skid pad acceleration.

      Application. This Roush Performance Single Adjustable Coil Over Kit is specifically designed for use on 2015 to 2021 Fastback and Convertible Mustangs that is not equipped with the MagneRide Suspension.

      Fitment: 2015 2016 2017 2018 2019 2020 2021 Details

      Roush 421839

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Front Strut Assemblies
      • (2) Rear Shocks
      • (2) Rear Springs
      • (2) Spring Mount Stops
      • (2) Spanner Wrenches

      Tech Specs


      Customer Reviews (5)

        Reviews of Roush Suspension products have an average rating of 4.7 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • Bullitt - 19, 20
          • EcoBoost - 15, 16, 17, 18, 19, 20, 21
          • GT - 15, 16, 17, 18, 19, 20, 21
          • V6 - 15, 16, 17

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