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SR Performance Polyurethane Spring Isolators - Rear (79-04 All, Excluding 99-04 Cobra)

Market Price $22.99 You Save 13% ($3.00)
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$19.99

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  • Item 56055

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    Features, Video & Details

    • Made of Graphite Impregnated Urethane for Long Life
    • Improves Handling and Steering Response
    • Fits: 1979-2004 Mustangs

    Review & Installation Video

    Review & Install Video

    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 Rear rubber units found on the 1979-2004 Mustangs these SR Performance Spring Isolators will greatly improve the handling of your lowered pony. Not for use on SVT Cobra's with Independent Rear Suspension (IRS).

    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# 56055

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    Hardware included:
    • None required
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Bullitt - 01
    • Cobra - 93, 94, 95, 96, 97, 98
    • Cobra R - 95
    • 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

    Does not fit 1999-2004 SVT Cobra's with Independent Rear Suspension (IRS)

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    Questions & Answers (9)

    5 Top Rated Questions

    I put lowering springs all around. Now when I hit a bump it jars me out of the seat. Will these fix that?

    • They may help settle the springs on the seats but, shocks are responsible for the ride quality I would recommend changing the shocks.

    Helpful (1)

    will these affect my ride height at all if i change out the stock isos to these? i havent lowered the car but getting new shock absorbers

    • No, it won't effect ride height . Change them out.

    Helpful (1)

    My cobra is lowered, currently sitting on 17's however I'm getting ready to bolt on some 18's with a 295/40 tire out back. At the moment I'm not running any iso's and the fitment is a touch tighter than I'd prefer... Will I regain any extra clearance by reinstalling these iso's in the rear? I mean I know it won't be much, but I really don't need all that much anyway.

    do these work on the stock springs?

    • The SR Performance Polyurethane Spring Isolators can be used with stock and aftermarket springs.

    Helpful (0)

    Are these spring isolators universal? Im purchasing godspeed Traction-S Sport Springs and am not sure whatsoever if it matters what size or diameter the isolators are. Thanks

    • These isolators will work with any 79-04 Mustang, with the exception of 99-04 Cobras. This will also work with different springs.

    Helpful (0)
    Post Your Question
    4 More Questions
    Will this lower the car at all? 1 answer
    Hi, Will these isolators squeak like polyurethane bushing would? I don't want to have to install things 2 times to re-grease them down the road. Do you require or suggest special grease to avoid that, or they will stay quiet for the life of the part like rubber would. Thanks. 1 answer
    When installing lowering springs, I reused the old isolators. Eventually, I began hearing a loud clunking noise whenever I hit a bump. If I replace my isolators, will the noise go away? 1 answer
    What's the inside and outside diameter for these. I want to use to fit for an adjustable coil over set. 1 answer

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    Customer Reviews (100+) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

    • Handling Improvement 4.593333 4.6
    • Ride Quality 4.76 4.8
    • Appearance 4.706666 4.7
    • Bang For Your Buck 4.826667 4.8



    • 5/5

      Installation Time: Afternoon

      March 18, 2019

      Nice

      Good quality ,Went from 0 to 100 real quick. Use electrical tape to Fasten spring isolator to spring for easier installation

      Reckless

      Year: 2002 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      March 08, 2019

      Works great

      Works great with the new lowering springs I got. Still have vary good ride quality and I recommend to get this with new springs.

      Chris

      Year: 2002 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      February 26, 2019

      Rear spring isolators

      Product is good quality and seems to have taken the harshness out of the rear when hitting bumps.

      MichaelC

      Year: 1990 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      February 21, 2019

      Black 99 Gt

      Perfect fit a lot nicer than the factory ones easy to install springs was already out thanks A/M

      MikeT

      Year: 1999 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      February 10, 2019

      Mustang aroo

      Needed this part for my stang got it quick and they fit perfect thanks a lot for your fast service Customer for life Daniel

      DanielC

      Year: 1998 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      January 26, 2019

      Improved handling

      Great part good price and received them very quickly!

      StephenW

      Year: 1995 Submodel: Cobra

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      January 24, 2019

      Great quality

      A huge improvement over the factory rubber bushings!

      EricB

      Year: 1997 Submodel: GT

      Helpful (2)

    • 4/5

      Installation Time: Shop Install

      December 27, 2018

      Great product

      Had my shop install these. They didn't say anything so I'm assuming they fit well. Car feels nice and firm with these in place of the rubber ones.

      RobY

      Year: 2003 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      December 21, 2018

      SR PERFORMACE ISOLATORS

      THESE ISOLANCETORS ARE A MUST HAVE A GREAT ITEM TO HAVE WAY BETTER THAN THE FACTORY OEM ONES MADE OF DURABLE MATERIAL THANKS AMERICAN MUSCLE AND SR PERFORMA

      RayG

      Year: 2003 Submodel: Mach 1

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      December 20, 2018

      Sr spring isolators

      Awesome quality. Work great and quieted thing down

      JesseH

      Year: 2004 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      December 07, 2018

      Perfect fit

      A must have if your changing out your old springs or simply replacing your old worn out ones

      JonD

      Year: 2002 Submodel: GT

      Helpful (3)

    • 4/5

      November 26, 2018

      Correct Parts

      Once I received the correct parts they appear to be an easy install. Unfortunately, the car is now in storage pending spring upgrades.

      CharlesC

      Year: 2004 Submodel: Cobra

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      November 25, 2018

      Good value

      High quality poly insulators. Replaced when doing rear control arms and axle bushings.

      94vert505

      Year: 1994 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      November 17, 2018

      Lowered

      I lowered my 98 GT last year, using the lowering springs offered from AM, and I didn't get these isolators at the same time. Mine were pretty beat up but, I had to re-use them. This year, i needed to change out the rear, drive shaft bearings so, since I had to drop the rear anyway, I decided to get these isolators and do it all at the same time. They are definitely better quality than the stock ones so, I probably won't ever have to replace them again! Pretty good deal at $20

      73challenger503

      Year: 1998 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      October 26, 2018

      Great price and quality

      Had to replace the springs got these to go with them. Perfect fit easy install!

      ChefGwhite

      Year: 2003 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      October 18, 2018

      Nice

      Good upgrade over the stock insulators. A must when installing a set of springs.

      KennardR

      Year: 1999 Submodel: GT

      Helpful (4)

    • 5/5

      October 15, 2018

      Spring Isolaters

      Great fitment, easiest install ever! :) great product and a simple replacement of the isolaters makes a huge difference on the movement of the springs. For reference: there's 3 stars for improvement, because the handling increased by 3 points as compared to previous ride.

      FanOFord

      Year: 1998 Submodel: GT

      Helpful (4)

    • 3/5

      September 24, 2018

      Wrong Part!

      This part is a part of a bundled but the rears do not work for an IRS system. You have to read the fine print, in the midst of your excitement when ordering these Isolators. I am sending the rears back. I ordered the correct ones that where not bundled/recommended when you choose lowering springs.

      Charles

      Year: 2004 Submodel: Cobra

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      September 16, 2018

      Very good product

      If your going to lower your car you need these...The dactory rubber isolators were mashed/cracked

      RichardK

      Year: 1998 Submodel: GT

      Helpful (4)

    • 5/5

      September 11, 2018

      Poly isolators

      Exactly what I needed.............................

      BigBen408

      Year: 1994 Submodel: Cobra

      Helpful (4)

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