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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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  • Item 56055
  • MPN# 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

    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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    4 Questions / 4 Answers

    Ask a Question

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

    BigAl

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

      AMwhitecobraadam

    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

    CamP

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

      88GTConvertible

    Helpful (1)

    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?

    Will123432

    • While there is a chance the isolators may be the cause of the noise you were hearing here, we would recommend having a professional take a look over your vehicle in person, as we would not want to speculate or ill advise. They should be able to best diagnose your vehicle being physically present. 

      AMBrianT

    Helpful (0)

    What's the inside and outside diameter for these. I want to use to fit for an adjustable coil over set.

    Vincent

    • The smaller spacer will be about 2 1/4" inside diameter and 3 1/2" outside diameter. The larger spacer will be about 4" inside diameter and about 5 1/2" outside diameter.

      Ricky36

    Helpful (0)

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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 4.590551 4.6
    • Ride Quality 4.748032 4.7
    • Appearance 4.700788 4.7
    • Bang For Your Buck 4.80315 4.8



    • 5/5

      Installation Time: Less than 1 Hour

      July 09, 2018

      Nice

      I ordered both top and bottom front to back and I can tell you that you will not be disappointed

      Preston

      Year: 2002 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      July 06, 2018

      Nice rubber

      squeezes alot bit thats just because the springs are setting up over all great quality

      Kingkustomz225

      Year: 2003 Submodel: V6

      Helpful (0)

    • 4/5

      July 03, 2018

      Satisfied

      Nice product havent installed them yet but seems way better than original rubber isolators...nothing but good quality for my ride

      ScottR

      Year: 2002 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      June 30, 2018

      2004 mustang GT convertible-sonic blue

      Bought these to install along with Motorsport spring kit m5300g made by eibach. Nice n quiet

      JerryK

      Year: 2004 Submodel: GT

      Helpful (1)

    • 5/5

      June 23, 2018

      The spring isolators are great

      These are way netter than the regualar stock ones and way stiffer too

      SamuelH

      Year: 1989 Submodel: GT

      Helpful (1)

    • 5/5

      June 13, 2018

      Isolators

      Great product and the price is great. Thanks American muscle.

      TimT

      Year: 1988 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      June 13, 2018

      Good replace ment

      There a good replacement and easy to install just unbolt and compress the spring and that was it

      ManuelM

      Year: 2000 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      June 08, 2018

      perfect

      These fit perfect for my springs and were high quality. Fast shipping also

      04stang

      Year: 2002 Submodel: GT

      Helpful (1)

    • 5/5

      May 31, 2018

      Control arms..

      Makes it complete with the new control arm bushings!

      LeeM

      Year: 1994 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      May 25, 2018

      Isolators

      I had to do a replacement on the isolators of my rear springs i didnt have none on mine and know it feels perfect

      JavierJ

      Year: 2000 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      May 23, 2018

      Installed flawless

      Installed easy and great fit. New springs set nicely in them and they seem to be perfect.

      93FoxBody

      Year: 1993 Submodel: GT

      Helpful (1)

    • 4/5

      Installation Time: Less than 1 Hour

      May 21, 2018

      Great isolators!

      These were great items and I'm glad we got them! They went in super easy and are a welcome addition on this build.

      MrsHinNH

      Year: 1997 Submodel: Cobra

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      May 19, 2018

      I love it

      All the noise went away. Old ones were rotted away

      StambaughC

      Year: 2002 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      May 14, 2018

      Spring isolator

      Came in time and the ride is amazing with the sr performance springs can’t go wrong amazing. Thanks AM.

      LeniF

      Year: 2001 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      May 14, 2018

      Overall good quality

      I ordered these as i was putting new springs all the way around my car. They feel more sturdier than the old worn out ones. Total time to install was less than 30 minutes.happy with this purchase.

      Elazteka

      Year: 2000 Submodel: V6

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      April 28, 2018

      rear isolators oem replacements

      great replacement for those worn out cracked and smooshed oem ones. Get some....

      MarkS

      Year: 1993 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      April 27, 2018

      Lowering springs

      Quick delivery of a nice product. Look nice and work well..no complaints

      AlanS

      Year: 1989 Submodel: LX

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      April 21, 2018

      following up

      Nice quality, good ride . I know there are more high quality sets out there, But this has been very good for me

      hunter1d

      Year: 2003 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      April 16, 2018

      Installing these were easy

      My car rides smoother and comfortable and no noise or rubbing issues these are great for rear springs

      JorgeM

      Year: 1994 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      April 15, 2018

      slightly more sure footed.

      replaced my smashed and worn out soft rubber insulators with these.good upgrade makes rear end feel more stable and predictable in corners .

      DanR

      Year: 2004 Submodel: V6

      Helpful (1)

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