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Viking Performance Warrior Double Adjustable Rear Shock (15-20 GT, EcoBoost, V6)

Item 390832
Market Price $229.00 You Save 10% ($24.00)
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$205.00 (each)

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      Review & Installation Video

      Hey, guys, Stephanie with, here with an overview of the Viking Performance Warrior Series double adjustable rear shocks for the S550 Mustang. In this video, we're gonna be talking about a few different things with these double adjustable rear shocks. We're gonna talk about the construction and functionality of these, the performance that you can expect from them and the install as well. So I'll get into more detail later, but I can tell you right now that I'm going to call this install a one out of three wrenches in the difficulty meter. These shocks are gonna be something that you're gonna want to check out if you're looking for an adjustable shock setup for an S550 that's mostly driven on the street, but that occasionally sees some track use. These are the Warrior Series shocks, which are designed for more of a street strip use as opposed to just track use. They do have a large range of adjustment, and the adjustment points are based off of a digressive curve, which I'll explain more in a second. But the rebound capabilities of the shock are what's gonna help the car with traction. You need huge rebound forces in a race or performance application because it's gonna help you maintain more of a consistent contact patch with the tire. The Warrior Series shocks are double adjustable, which not only means that you can adjust both compression and rebound, but you can adjust them independently. These shocks do have a large range of adjustment, like I mentioned before. You have 19 positions of adjustment on both the compression and the rebound side. The adjustment is on that digressive force curve, which means that the forces increase quickly at lower points and level off at higher ones. This makes for a total of 361 different valving combinations, so it's safe to say that you can find something that'll work for you here. Now, this is gonna be different than Viking's Crusader Series shocks. The Crusader Series shocks are both digressive and progressive-valved and they have some more rebound adjustment. They're a specialized drag shock, so if that's more of what you're looking for, you can always check those out. But getting back to the Warrior Series here, having 19 different points of adjustability means that you can fine tune these for your application. These are gonna help you dial in your setup, and they're even gonna be multi-functional for you. If you have a street strip car, you can find your ideal settings for the street and have different settings for the strip. These can function well for you on the street, especially on high horsepower-modified applications. And with this much adjustability, these will work for any performance application, even though they aren't as specialized as the Crusaders.These shocks have a lightweight aluminum body and a clear anodized finish. As far as internals, they do have machined pistons with PTFE and a bronze piston wrap. Now, the piston rods are hard chrome plated and they're centerless grind as well. The shocks can be rebuilt or re-valved by the Viking factory or an authorized rebuilder, so if you ever end up having any issues with these, there's always that fact. These do have a two-year material and workmanship warranty on them too. When it comes to price, you can expect to pay right under the $200 mark per shock. This is pretty much in line with what you can expect to pay for a standard adjustable shock. As far as the install, you're looking at about an hour for each side, and you can expect a one out of three wrenches in the difficulty meter. You won't need any specialized tools to get the install done, but having access to a lift will make this install easier for you since you'll need to really get under the car. There are only two upper and two lower bolts holding the shock into place. Once those are removed, you can pull the stock shock out and get your new shock into place. You will have to compress the shock and align the upper mount under the body of the alignment pins, but that isn't difficult. I'd say that the more difficult part here, and it isn't even really difficult at all, is that you'll have to test and tune these shocks. You won't really know what settings you're gonna wanna run until you get some track time or even some seat time, but the actual adjusting isn't hard, it's just finding the right settings for your car. Wrapping things up with the Viking Performance Warrior Series double adjustable rear shocks, these are shocks that are made for high performance, giving you both compression and rebound adjustment capabilities in over 300 possible different combinations of settings. These are a serious shock for someone that's serious about performance, and I suggest you check them out more online, right here at

      Product Information

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


      • Warrior Series Adjustable Rear Shock Absorber
      • Improves Handling and Performance
      • Twin-Tube Design with Digressive Valving
      • 19 Positions of Compression Adjustment
      • 19 Positions of Rebound Adjustment
      • Lightweight Aluminum Construction
      • Clear Anodized Finish
      • PTFE/ Bronze Piston Seals
      • Direct Bolt-On Replacement
      • Sold Individually - (1) Shock
      • 2-Year Manufactures Warranty
      • NOT Compatible with MagneRide Suspension
      • Fits 2015-2020 GT, EcoBoost and V6 Mustangs


      Warrior Design. Viking Performance offers superior adjustment and control in a high quality lightweight Shock Absorber. This Warrior Series Double Adjustable Rear Shock features a twin-tube design and digressive valving. With independent adjustability, this Shock is far superior to many others out on the market and is a budget friendly option for the features you'll find. Designed for use on stock height and up to 2” dropped Mustangs, this Rear Warrior Series Shock by Viking is the perfect choice to upgrade your S550’s suspension.

      Double Adjustability. This Viking Warrior Rear Shock features 19 positions of adjustability for both rebound and compression damping. Among its total of 361 valving combinations, you're going to find the combo that works perfectly for your S550. With two separate adjustment knobs that are clearly marked with a "C" for compression and an "R" for rebound, finding the perfect setting for cruising or racing couldn't be any easier.

      Quality Construction. Precision machined out of lightweight aluminum, this twin-tube Viking Performance Warrior Shock features a clear anodized body, PTFE/bronze piston seals and a 5/8” hard chrome plated rod. It'll have the smooth control and cushioned ride you're looking for.

      Direct Bolt-on Replacement. Viking Performance engineered their Warrior Adjustable Shocks to be a direct bolt on replacement for your Mustangs factory shock absorbers. Please note that an alignment, by a qualified shop, is highly recommended after installation.

      Two Year Warranty. Viking warrants that their products will be free from defects in material and workmanship for two years from date of sale to the original purchaser. This warranty does not cover abnormal use, negligence, vehicle accident, improper or incorrect installation or maintenance. Some exclusions may apply, please see manufacturer's warranty for details.

      Application. This Viking Performance Warrior Double Adjustable Rear Shock is specifically designed for use on 2015-2020 GT, EcoBoost and V6 Mustangs. Does not fit Models equipped with MagneRide Suspension. Sold Individually.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# B258

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (12)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 12 customers

      Installation Time: Less than 1 Hour

      • December 01, 2019

        5 2017 GT - JesusT Installation Time: Less than 1 Hour

        Very good shocks

        You can feel the difference since you get them installed!

        Helpful (0)
      • January 17, 2019

        5 2018 GT - Low5ohh Installation Time: Afternoon

        Amazing Quality!

        Absolutely amazing I would recommend it to anyone wanting to upgrade their shocks! The rear feels so much more planted!

        Helpful (2)
      • September 10, 2018

        5 2018 GT - DavidS Installation Time: Less than 1 Hour

        Awesome product

        Love the adjustability. Highly recommend these shocks.

        Helpful (7)
      • September 03, 2018

        5 2015 GT - MichaelG202 Installation Time: Less than 1 Hour

        2015 GT Vert upgrade

        I had these installed on my 2015 GT convertible. Stock springs and struts. Car had a harsh ride and I was looking for something to improve it. Have used Koni orange on prior Mustang. These shocks truly improve the ride and handling. I am amazed at the difference and am still testing different settings. 1c - 3r was like driving a caddy. 3c - 5r was still a good ride but tighter handling. Currently testing 2c - 6r.

        Helpful (9)
      • April 25, 2017

        5 2015 GT - Kennysean Installation Time: Less than 1 Hour

        Feels like a new car.

        I installed these shocks with a bunch of other parts, but if I had to put a time on the install it's less than an hour. They look great. Definitely give the car a better ride. Can't wait to really test them out with all my other suspension mods.

        Helpful (9)
      • October 05, 2016

        5 2016 V6 - Nick

        Easy install

        100000 times better than old stuff. Price isn't to shabby either. Very happy with mine

        Helpful (11)
      • October 04, 2016

        5 2015 GT - 99stang69

        Viking Performance Adjustable Rear Shock

        Viking Performance Warrior Double Adjustable Rear Shock Good purchase. Thanks american muscle!

        Helpful (9)
      • October 04, 2016

        5 2015 V6 - Miike96


        This item is perfect. It's what I needed and good quailty. Worth every penny!

        Helpful (10)
      • October 04, 2016

        5 2015 V6 - OmarR

        Love it

        I love these adjusters good bang for you're buck!!

        Helpful (10)
      • October 04, 2016

        4 2016 GT - Billy

        Feels amazing!

        Ride quality is excellent. I couldn't be happier with my purchase! Thanks AM.

        Helpful (9)

      Questions & Answers (2 answers)

      2 Top Rated Questions

      Will these shocks improve launches and help lower track times?

      • Depending on the adjustment settings, they can help with launches and track times.

      Helpful (0)

      If I purchase these Rear Shock for my Gt did I need to change stock oem front Shock also ? and what about all springs oem does need to be change ?

      • You do not necessarily need to change the front struts, but it would be a good idea to do so. This will make sure you have a level suspension. These Shocks can be used at factory height and will support a 2" drop as well. This means you are able to use your factory springs without any worries. Though, if you plan to lower the car, I suggest changing out your front struts so that you will not have any suspension issues.

      Helpful (0)
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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Rear Shock

      Tech Specs

      Will It Fit My Mustang

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

      Not Compatible with GT350s

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