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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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Ship to: ASHBURN - 20146
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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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    3 Questions / 3 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)

    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 4.564103 4.6
    • Ride Quality 4.735043 4.7
    • Appearance 4.709402 4.7
    • Bang For Your Buck 4.803419 4.8



    • 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 (0)

    • 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 (1)

    • 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 (1)

    • 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)

    • 5/5

      Installation Time: Full Day

      April 13, 2018

      They Work

      Replaced the stock spring isolators when I did a spring upgrade on my 99GT. All I can really say is they appear to be built well, and after 5 days appear to be working well no squeaks or other spring related noises. If your changing your springs it just makes sense to replace the isolators at the same time.

      SteelSteve

      Year: 1999 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      April 12, 2018

      Soft ride

      It didn’t take long to put both sides in and I did it on my own with jack stands. I feels like a new car

      JustinW

      Year: 2003 Submodel: V6

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      April 09, 2018

      Sr performance polyurethane spring isolators

      These work great and are a good replacement for the factory wrapped insulators.

      EdwinR

      Year: 1998 Submodel: Cobra

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      March 12, 2018

      Excellent price, superior fit and top quality!

      Well it boiled down to this brand (SR) or another I won't mention. After reading reviews and hearing first hand that this was the brand to go w/I did....Am I happy? Yes! Can I feel a slightly crispier ride? Yes! Best bang for your pocket change w/regards to a suspension improvement. Thanks American Muscle.

      555666

      Year: 1992 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      March 12, 2018

      schram mustang gt

      this product is nice. went on the springs easy. haven't had a chance to drive my car cuz of the snow.

      RobertS

      Year: 2002 Submodel: GT

      Helpful (1)

    • 5/5

      March 02, 2018

      A MUST!

      If you want to really get the most out of a performance suspension... You must change out all components, not just the springs!

      darkhorsegt

      Year: 2000 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      February 25, 2018

      Great purchase.

      Installed these when I dropped my 98 Cobra convertible. If you want to keep your isolators when you let your Mustang I'd recommend these to you. The quality and fit were excellent.

      Jay

      Year: 1998 Submodel: Cobra

      Helpful (1)

    • 5/5

      February 20, 2018

      1st ride.

      They did exactly what they were supposed to do. I mean they hold your springs in place.

      CliffordPolls

      Year: 2001 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      February 09, 2018

      Well Done

      Perfect for my lowering springs and a nice item. Installed easily

      RachelH

      Year: 1993 Submodel: LX

      Helpful (1)

    • 4/5

      February 06, 2018

      Good product and price

      I have seen some inconsistency with the SR products but the isolators seem to be of good quality with a fair price.

      Robert

      Year: 1995 Submodel: Other

      Helpful (1)

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