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SR Performance Polyurethane Spring Isolators; Front (79-04 All)

Item 56054
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      Review & Installation Video

      Justin: If you're getting ready to install an aftermarket set of lowering springs on that '79 to '04 Mustang at home, well then grabbing a new set of isolators should be at the top of your list as those factory options are probably pretty beat after a couple of decades of wear and tear. Now, the SR options that we have here will be made from graphite infused urethane that will help provide you and your ride with years of quiet and trouble-free use all for right around 30 bucks for the front set. Now, your installation will involve removal of the front spring, so automatically the site's gonna kick this one up to a soft three out of three wrenches on the difficulty meter, take you about an hour or so to complete per side depending on how quickly you like to work. However, guys, if you hang out with me for a little bit, we'll show you more on the job later in the video.So, this is gonna be a short little PSA, if you will, about the importance of replacing your factory isolators if you haven't done so already. Now, as you may or may not know those factory isolators can get a bit brittle over the course of 20 to 30 years and can deteriorate leading to metal on metal contact which is basically gonna result in some unpleasant noises. Not only that, but if the factory isolator is completely wasted, it can even lead to some sloppiness in your ride quality as well, as some of our customers have pointed out in the customer review section. Now, this kit from SR performance is going to completely replace both the top and bottom isolators on the front of your '79 to '04 Mustang. Now ideally, if you are replacing these isolates at the same time as swapping a set of lowering springs then obviously would make a lot of sense to knock out the rears as well. And if you are gonna do that, well you can just so happen to find the SR Performance matching rear isolators here on the site for around 20 to 25 bucks. Now the isolator themselves will be made from a durable urethane material which is then infused or impregnated with the graphite here to help prevent these things from drying out and deteriorating on you like those stockers.And with that said guys, these are gonna be completely maintenance-free, right? You don't have to grease them or anything like that over the years. But now we wanna show you just what it takes to get these guys in place and to do so, here is your detailed walkthrough we promised you earlier along with a quick tool break down.Man: The tools used for this install are a half-inch impact gun, a 3/8 impact gun, a 3/8 ratchet, an 18-millimeter wrench, a 24-millimeter socket, a 15-millimeter socket, and a pry bar. So, the first step of this install is gonna be to get the front end of your vehicle up off the ground and pull the front wheels. This will give you the access to remove your caliper and your rotor. Once you do that, then you can start disassembling the rest of the front suspension to get your front spring out. Next, I'm gonna unhook the sway bar end link and then I'm gonna put some support underneath the lower control arm while I disconnect the shock.Now I put a floor jack underneath my lower control arm to support my spring while I disconnect my shock assembly here at the front. This is gonna keep the spring from unloading uncontrollably while you're unbolting the strut assembly from the knuckle. Now I'm gonna use a little bit of leverage to get underneath the coil spring, push down on the lower control arm and remove the spring. Now I can just grab on to my isolator here at the bottom and just unravel it from the coil spring. Now I'm just gonna apply a little bit of lubricant to help get my new isolator onto the bottom of my coil spring. Now that I've got my new isolators installed, I can reinstall my coil spring back into the pocket for the lower control arm. Now that I have the coil spring seated on one edge of the pocket, I can use a floor jack to slowly raise the lower control arm into place and seat the spring properly. Make sure when you raise your lower control arm back up that you line up the sway bar end link with the sway bar hole.Once I was able to use my floor jack to raise the lower control arm up to the proper height, I can reinstall my rubber bushing for my sway bar end link that I lined up while raising everything. And then I can put my bolts back in from the knuckle to the strut assembly. Now I can reconnect my ABS clips and route the wire harness as per factory. Now I can tighten up my sway bar end link bolt. Now you can reinstall your calipers, throw your wheels back on, and you're pretty much all wrapped up. And now you can repeat this process on the other side as it's exactly the same. And that's gonna wrap this review and install of the SR Performance Polyurethane Front Spring Isolators for your '99 to '04 Mustang. Thanks for watching and for all things Mustang, keep it right here at

      Product Information

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


      • Made of Graphite Impregnated Urethane for Long Life
      • Improves Handling and Steering Response
      • Includes Drivers Side and Passengers Side
      • Fits 1979 to 2004 Mustangs


      Performance Upgrade. If you are installing a new set of lowering springs it is a good time to replace your old worn out rubber Spring Isolators with a new set of SR Performance Polyurethane Spring Isolators available from AmericanMuscle.

      Superior Materials. These SR Performance Polyurethane Spring Isolators are made from polyurethane that has been impregnated with graphite so they will not dry out and crack like the stock rubber pieces.

      Application. Designed to replace the stock front 1979-2004 rubber units these SR Performance Spring Isolators will greatly improve the handling and steering response of your lowered pony.

      SR Performance

      Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

      MPN# 56054

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 100+ customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • March 22, 2020

        5 1985 Other - Aw93 Installation Time: Afternoon


        Nice poly isolators, super easy install with my new ford performance C-springs

        Helpful (0)
      • March 09, 2020

        5 2004 GT - ZackS Installation Time: Afternoon

        Nice n new

        Solid replacement, quality product. It helps to lubricate the isolators that are tube-like. I used a little dish soap.

        Helpful (1)
      • February 14, 2020

        5 1989 LX - CodyRob77


        Love them. Car rides alot better now with them on. My old ones made it feel like it was on rails.

        Helpful (0)
      • February 06, 2020

        5 1987 LX - Bstang Installation Time: Less than 1 Hour


        Was great for replacing my 30 yr old rubber isolators that were on my notch!

        Helpful (0)
      • January 27, 2020

        5 1997 GT - ElPri Installation Time: Less than 1 Hour


        high quality product! fast shipping! very easy to install. this product is a must when installing new springs. i installed these on my 1998 cobra.

        Helpful (0)
      • January 03, 2020

        5 2002 GT - Gcardeirojr Installation Time: Less than 1 Hour

        Completely satisfied..

        Works perfect. Highly recommend.. so far everything I've purchased through American Muscle..

        Helpful (0)
      • December 27, 2019

        5 1995 GT - EfrainC Installation Time: Less than 1 Hour

        Great product!

        Would definitely recommend product if you are thinking about replacing your springs! It was very easy to install.

        Helpful (0)
      • December 01, 2019

        5 2002 GT - DJ77 Installation Time: Less than 1 Hour

        Polyurethane Spring Isolators

        Quick shipping and fit perfectly on the SR springs. Great replacement for the worn out factory isolators.

        Helpful (0)
      • November 28, 2019

        5 2001 Bullitt - Bullitt1474 Installation Time: Less than 1 Hour

        Spring Isolators

        Top notch quality , I purchased other brands befor which don't even come close to these

        Helpful (0)
      • October 16, 2019

        4 1995 V6 - JoeR Installation Time: Less than 1 Hour

        Much better than the stock rubber isolators

        These are a must when replacing the OEM rubber spring isolators, especially at high mileage. Replaced mine at 285k miles and the old ones were so badly seized onto the control arms, so much that they broke off a piece of the old springs. If you're doing any kind of front suspension work or even just lowering springs, get these - definitely worth it. Just be sure to put some Vaseline or lubricant on the springs to help with pushing the tubes on!

        Helpful (0)

      Questions & Answers (6 answers)

      5 Top Rated Questions

      I have SR Coilovers... I don't need these right?

      • The SR Performance Polyurethane Spring Isolators are for use if and when you replace your springs or decide to upgrade to lowering springs. If you purchased the SR Performance Coilovers, you will not need these with that install.

      Helpful (1)

      Do you have to apply any grease to the isolators? I know poly suspension bushings usually require greasing to keep the noise down - are these similar? or just plug-n-play without any greasing needed?

      • No grease is required or recommended. Very clean install and no squeaks when I installed them with new lowering springs.

      Helpful (1) Show 1 more answer

      How much does it raise the front?? I bought some H&R lowering springs for my 04 cobra convertible and whoever had her before me lowered it without isolators and i didn't buy new ones. it sits too low really and bottoms out way too much. how much can i expect these isolators to raise the car back up? besides a different set of springs what can i do to raise her up a little if the isolators aren't enough?

      • You can expect these Isolators to increase the ride height of your car no more than 1/4" to 3/8". Figure the thickness of the Isolators (top and botton) minus a small amount for comression of the Polyurethane.

      Helpful (1) Show 3 more answers

      Do I need spring isolators? Or can I instal with out them?

      • Aftermarket springs can be installed without spring isolators but may initially create a small creaking noise that will be caused by the metal-to-metal contact from the spring and struts.

      Helpful (0)

      So these are just for the rear? Would this cover all i need if I decoder to go for sr lowering springs?

      • These are for the front only. Other components are needed when installing lowering springs, feel free to give us a call to discuss details.

      Helpful (0)
      Post Your Question
      1 More Question
      Does the front shocks need isolators for the top and bottom of the spring? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      Hardware included:
      • None Required

      Tech Specs

      Will It Fit My Mustang

      • Bullitt - 01
      • Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
      • Cobra R - 93, 95, 00
      • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Mach 1 - 03, 04
      • Other - 79, 80, 81, 82, 83, 84, 85, 86
      • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

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