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H&R Super Sport Springs - Convertible (94-04 All; Excluding 99-04 Cobra)

AmericanMuscle no longer carries the H&R Super Sport Springs - Convertible (94-04 All; Excluding 99-04 Cobra). Please check out 1999-2004 Mustang Springs for an updated selection.
32 Reviews
Our Price


  • Item #47104
  • MPN# 51658-77

  • Market Price $298.99
  • You Save 13% ($39.00)
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AmericanMuscle no longer carries the H&R Super Sport Springs - Convertible (94-04 All; Excluding 99-04 Cobra). Please check out 1999-2004 Mustang Springs for an updated selection.

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Customer Photos
  • Aggressive Muscular Stance
  • Improves Handling
  • Lowers Center of Gravity
  • Progressive Spring Rate
  • Estimated Drop: Front - 2.0”, Rear - 1.6”
  • Fits all 1994-2004 GT Convertibles, excluding 99-04 Cobras
Improves Handling. The most popular progressive rate spring in H&R's line-up, Super Sport Springs will lower your Mustangs center of gravity, to reduce squat during acceleration, body roll in the corners, and excessive nose-dive under hard braking. Sport Springs feature more control than that of the factory springs, but are still comfortable enough for daily driving and occasional track use.

Aggressive Stance. The H&R Super Sport Springs not only improve the handling of your convertible Mustang, but they also improve the overall appearance by lowering the ride height approximately 2.0" in the front and 1.6" in the rear to eliminate that nasty raised 4x4 truck look for a more aggressive muscle car stance.

Recommended Upgrade. When installing new springs you should also replace your old worn out rubber Spring Isolators with a new set of Polyurethane Spring Isolators, see drop down option above.

Application. This set of four H&R Super Sport Springs are designed specifically for use on all 1994 to 2004 Convertible Mustangs. Does not fit IRS equipped SVT Cobra models.

Fitment: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (4) Lowering Springs
Installation Info
Tech Specs
Springs Specifications
Spring Rate: Front: 700-760 lb/in.
Rear: 275-300 lb/in.
Usage: Street
Year: 1994-2004 Model: GT Convertible
Progressive or Standard: Progressive Estimated Drop: 2.0"F / 1.6"R
Will it fit my Mustang?
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

Fits Convertible Only. Does not fit IRS-equipped 99-04 Cobras

Most Helpful Reviews

great springs

these spring fit great with 315/35/17 in the rear. i tried eibach pro kit and did not drop enough, but these are perfect.

Helpful (17)

H&R Springs

Absolutely love the springs! Lowered my 01" GT Convertible exactly the way I wanted. I highly recommend these springs and thank American Muscle.

Helpful (15)

Overall Rating 4.9 out of 5 stars
Read All 32 Reviews

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Customer Reviews (32) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Handling Improvement 4.666667 4.7
  • Ride Quality 4.75 4.8
  • Appearance 4.916667 4.9
  • Bang For Your Buck 4.833333 4.8

  • 4/5

    January 30, 2009

    great springs

    these spring fit great with 315/35/17 in the rear. i tried eibach pro kit and did not drop enough, but these are perfect.

    dave hernandez

    Helpful (17) (0)

  • 5/5

    February 21, 2010

    H&R Springs

    Absolutely love the springs! Lowered my 01" GT Convertible exactly the way I wanted. I highly recommend these springs and thank American Muscle.

    Dave Lake

    Helpful (15) (0)

  • 5/5

    April 10, 2010


    Hey if you want your 97 gt to look and feel like a high end sports car, get the springs!!!!! my car looks and drives great. thanks american muscle for the tutorial on how to install< you guys rock!!!!!


    Helpful (11) (0)

  • 4/5

    July 20, 2009

    Great Springs

    Put these springs on today on my 04 gt and what a difference in stance and ride. It has dropped about and 1 and 3/8 so far in the front and about an inch in the back. Cant wait to see it in a week after they are broken in.

    Dan Adamson

    Helpful (4) (0)

  • 5/5

    Installation Time: Full Day

    February 27, 2012

    Amazing Product

    I installed these spring on my Convertible GT in about one full day. The look was amazing and the ride was excellent considering how much they lowered the vehicle! Now my GT corners better than ever! As far as installation the rear was much more difficult to complete than the front. My recommendation is to diconnect everything before removing the lower control arm bolt. If not done; lining everything back up will be a challenge!


    Travis AFB, CA

    Helpful (2) (0)

  • 5/5

    March 27, 2011

    Best choice for your Convertable GT...

    First of all let me start of by saying this has been a great experience. I spent weeks looking online and researching for the right lowering springs for my 03 Mustang GT convertible. I decided on purchasing H&R super sport springs (51658-77) From American Muscle. I also purchased Maximum motersports caster camber plates (MMCC9994). I highly recommend doing the same if lowering your mustang. Also replaced the spring isolators, sway bar connecters, and tie rod ends. I ordered online Sunday afternoon. I received an Email that the Items were shipped Monday morning standard shipping. I received my 2 items Wednesday at Noon. Much sooner then I was expecting. Great service from AM. Thanks. Got a friend to help me with the installation. It took us two evenings to complete the whole installation or about 6 hours. It was not very hard as long as you take your time and read everything in the directions twice. At first measurement the front dropped 1.5" and the back 1.3" from stock. I expect them to drop a little more over the next 2 weeks. Still had to pay for an alignment but I saved about $300 doing it myself. Thanks AM, you Rock.


    Helpful (2) (0)

  • 5/5

    January 18, 2011


    I have these with full length sub frame connectors, KYB AGX adjustable shocks and quad shocks with maximum motor sports caster camber plates on my 2000 gt. I'm extremely satisfied, the rides pretty harsh but grips everything possible and is stable at speeds. I must stress that you need to replace the stock shocks when you install these springs..I blew mine in about 3k miles


    Helpful (2) (0)

  • 5/5

    Installation Time: Afternoon

    May 02, 2013

    Great appearance!

    I love the springs, well worth the money. My car has a very aggressive stance now, looks great, and the handling has improved. The only downside so far is when I took it to get my oil changed, and it was too low to fit over the pit, haha! Great buy. 5/5


    Kearney, NE, USA

    Helpful (2) (1)

  • 5/5

    May 01, 2011

    Amazing Springs.

    By far one of the best mods for the money. The drop is incredible. When we finally set the car down our jaws dropped. It is an entirely different look for my '96 GT. This is how every mustang should look. I also think it is really worth the money because of the performance you gain from it. Immediately after installing these, I went to a twisty road near my house and took the turns like a Miata. It was effortless. It improved my ride quality and traction over stock, especially on patchy roads. And it really helps control the flex of the convertible during acceleration. Its a difference that you just have to feel for yourself. Bottom line, my GT rides like a completely new car. Responsive, aggressive, effortless, attractive, affordable, amazing. BUY THESE SPRINGS.

    Reed L.

    Helpful (1) (1)

  • 5/5

    November 02, 2010

    lowering springs

    I have only installed rear springs and new shocks at present due to restoring my mustang and not having all new parts yet to do the front, but the rear sat down real nice. I cant wait to do the front!

    R T Red One Stang

    Helpful (1) (1)

  • 4/5

    November 22, 2008

    Great Looking!!!

    Had these installed at a shop and true install time would be half a day. They look great and make the car look mean. I like them.. Harder ride than stock. You feel everything!!!

    Steve K.

    Helpful (1) (1)

  • 5/5

    April 06, 2010

    H&R Springs

    Great set of springs!


    Helpful (2) (3)

  • 5/5

    Installation Time: Afternoon

    April 12, 2015

    Smooth ride as well as sporty feel

    Install was cake. The only problem I had was putting the nut back on the bolt of the bump steer kit. It's stripped now so I have to get a new one. I haven't figured out the pinion snubber thing yet but I'll see. I was told these are the most aggressive springs. Let's find out. So far. The guy in the Mercedes culdnt keep up with me off the line. I'm not sure how stiff it's really going to be because these are my first springs. Feels good to get rid of the old ones. Get new bushings in it as well.....very comfortable. sits just right.


    Irving, TX

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    July 18, 2014


    I searched for months trying to figure out what springs would lower my GT the best. After months of research I ordered these H&R`s and crossed my fingers I would get the drop Iv been looking for. Install took about 4 hours or so, also installed AM New KYB struts and shocks with new isolaters also. As soon as we set it back on the ground, my jaw dropped !! The front dropped 1 3/4 right away and the rear dropped 1 1/2 right away. All I could say was "AMAZING " !!!!!! This is worth every penny I spent ! My expectations were exceeded way beyond what I imagined it would look like. Plus with the New KYB struts and shocks......the ride is AMAZING and handling also !!!!! THANKS AGAIN AM FOR SUCH AWESOME PARTS !!!! Your loyal forever customer Russell Orl Fl


    Oviedo Fl

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    February 26, 2013

    Love these springs!

    I love these springs. The ride quality is a little stiff as expected with lowering springs but the look is fabulous. I paired these with tokico hp shocks and struts, poly isos, bumpsteer kit and cc plates and i love the way my car drives. Get these springs!


    Oak Ridge, NC, USA

    Helpful (0) (0)

  • 4/5

    Installation Time: Afternoon

    January 12, 2013

    Awesome springs!

    First off, they look great! They weren't too bad to install, but after finishing and going for a drive, I heard a weird noise coming from what seems to be the springs ( probably my fault though ), these springs do not sacrifice comfort at all, but I also did MM CC, and tokico shocks/struts. Took 2 evening's to install, but it was well worth the time and money! Overall I would highly recommend these springs to anyone.


    Helpful (0) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    September 21, 2012

    Lowered just right!

    This was one of the mods I really was looking forward to performing; my 97 GT was looking like a 4x4. These springs dropped my car just right and improved my handling around the turns. Very satisfied with the product!


    Warwick, RI

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    August 08, 2012

    H&R Springs

    wow it dropped my car 1.75 at start and they still need to break in, so wow its amazing what these springs look to your car. i can't stop looking at my car now.. its a great improvement to your suspension and with the prothane bushing kit, it feels great along with C.C. plates, Steeda X-2 ball joints and bump steer kit and some new shock/struts this car handles to the max.. love the looks its a must..


    Laredo, TX, USA

    Helpful (0) (0)

  • 5/5

    Installation Time: Full Day

    June 20, 2012

    h&r ss springs

    think they are great , sits lower then the Es also rides better only problem is its not level front is still lower


    trumbull , ct.

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    April 22, 2012

    Looks AWESOME

    I would highly recommend these springs to anyone looking for great handling, as well as awesome looks. Ride quality is good enough for your daily driver, but yet handles like its on rails in corners. Gives your stang that nice "racked" look. Fairly simple install with the instructions from AM. Looks good with a 315 tire in the rear.


    Lancaster, PA

    Helpful (0) (0)

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