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Eibach Sportline Spring Kit (79-04 V8 Coupe; 99-04 V6 Convertible; Excluding 99-04 Cobra)

Market Price $294.30 You Save 10% ($29.43)
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  • Item 47812
  • MPN# 4.1035

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Features & Details

  • Extreme Lowering & Aggressive Stance
  • Race Car Like Handling
  • Lower Center of Gravity
  • Progressive Spring Rate
  • Estimated Drop: Front - 1.7" Rear - 1.5"
  • Fits 79-04 V8 Coupes & 99-04 V6 Convertible, Excludes IRS
  • Clears Stock and Aftermarket Wheels & Tires.
Better Handling. Give your Mustang the sportscar type handling it deserves with an Eibach Sportline Spring Kit. This lowering spring kit lowers your Mustang's ride and center of gravity even more than the legendary Eibach Pro-Kit, for maximum improvement in acceleration, cornering, and braking performance. A set of Eibach Sportline springs are the no-comprimise choice for the enthuisast that still needs a streetable car.

Maximum Lowering. Eibach's Sportline Spring Kits are designed to deliver the lowest possible drop for a racecar like look and handling while still maintaining exceptional ride quality.

Progressive Design. Eibach uses their proprietary progressive spring design to create the Sportline springs. The result is a spring that delivers the maximum lowering and aggressive stance a true enthusiast demands, without compromising safety or ride quality.

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.

Clears Stock and Aftermarket Wheels & Tires. These lowering springs were engineered to be compatible with your factory size wheels and tires, as well as AmericanMuscle’s pre-configured wheel and tire combo kits (specific to your generation), to assure proper clearance with no rubbing issues.

Application.. This set of Eibach Sportline springs is designed for 1979 to 2004 V8 Mustang Coupes and the 1999 to 2004 V6 Convertible Mustangs. Will not fit 1999 to 2004 SVT Cobra's with Independent Rear Suspension (IRS). Sold as a set of 4.

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
  • (4) Lowering Springs
  • (1) Snubber
Installation Info
Tech Specs


  • 1979-1993 V8 Coupe:
    • Lowers Front: 1.7"
    • Lowers Rear: 1.5"

  • 1994-2004 V8 Coupe:
    • Lowers Front: 2.0"
    • Lowers Rear: 1.8"

  • 1999-2004 V6 Convertible:
    • Lowers Front: 1.7"
    • Lowers Rear: 1.5"

Springs Specifications
Spring Rate: Front: 550 lb/in.
Rear: 251 lb/in.
Usage: Street/Track
Year: 1979-2004 Model: 79-93 V8 Hardtop,
94-04 V8 Hardtop
99-04 V6 Convertible
Progressive or Standard: Progressive Estimated Drop:

1.7"F / 1.5" R
2.0 "F / 1.8"R
1.7"F/ 1.5"R

Will it fit my Mustang?
  • Bullitt - 01
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 99, 00, 01, 02, 03, 04
  • Cobra - 94, 95, 96, 97, 98
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

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

People Who Bought This Item Also Bought

Most Helpful Reviews

04 Mach 1

Easy Install......Car Looks Great....Took about 2 hrs. with the help of a friend. This is a great product, I Give It 5 Stars.

Helpful (1)

Perfect drop do your research

I kept bouncing back and forth between the sportline and h r super sports, so glad I chose these!!!! The worries about running with or without isolators shouldn't be a concern if you do your research ...

Read More
Helpful (1)

Overall Rating 4.8 out of 5 stars
Read All 58 Reviews

Customer Photos (89) Submit Your Photo

View All 89 Photos

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29 Questions / 4 Answers

Ask a Question

I am planning on putting 20" Rovos on my 2002 GT. Will these springs be too low?


I have a 2003 Mustang V6 coupe (not the convertible) will these still fit/work for my car?


  • Hello! The Eibach Sportline Spring Kit will only work on the Convertible V6 Mustang.


Helpful (0)

will these springs work on a 2001 gt convertible?


  • These springs do not work on GT Convertibles. The v8 engine mixed with the convertible is just a little bit too much weigh for these springs to take, so we offer springs specifically designed for GT convertibles.

    Doug P

Helpful (0)

Why wont these work for 99-04 GT convertibles?


  • Hello! The reason that this doesn't work with 99-04 GT Convertibles is due to weight. These springs are only good to hold a car that weighs so much, and unfortunately the added weight of a convertible and a V8 is a little much, so we have springs designed just for GT Convertibles.

    Doug P

Helpful (0)

Anybody running these with kooks long tubes on a mach 1? Have you scraped alot?


Do these springs fit on a 1998 Mustang Cobra convertible ?


  • The The Eibach Sportline Spring Kit will not fit on 1994-1998 Cobra Convertibles, due to the increased weight of the convertible model

    Rob D

Helpful (0)

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Customer Reviews (58) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Handling Improvement 4.8125 4.8
  • Ride Quality 4.5625 4.6
  • Appearance 4.8125 4.8
  • Bang For Your Buck 4.708333 4.7

  • 5/5

    September 13, 2016

    04 Mach 1

    Easy Install......Car Looks Great....Took about 2 hrs. with the help of a friend. This is a great product, I Give It 5 Stars.


    Year: 2004 Submodel: Mach 1

    Helpful (1)

  • 5/5

    July 30, 2016

    Perfect drop do your research

    I kept bouncing back and forth between the sportline and h r super sports, so glad I chose these!!!! The worries about running with or without isolators shouldn't be a concern if you do your research and know what drop you want. Currently im running no isolators in front and only the top isolators in the rear, once it settles I assume another 1/2" in the front but over all no noises or issues! Love eibach and their product.


    Year: 2004 Submodel: Mach 1

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    May 18, 2016

    Fantastic Product

    Great product. Makes the car look so much better than before and did not really effect the ride quality. Obviously being a stiffer spring its going to ride a little harder, but not much. Easy install, if you know what you are doing.


    Year: 2004 Submodel: Mach 1

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    July 12, 2012

    this product was great

    i was trying to find the right spring for my car,the guys at american muscle helped out alot. it lowered my car alot. 2.0 in the front and 1.8 in the rear. the handling was a big change from stock.


    Year: 1995 Submodel: GT franklin ky

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    April 02, 2012

    Big improvement

    Great product. Rides alot like the prokit, but looks alot better and handles like an Indy car. I would rec. these springs for anyone who wants a nice aggressive stance and still rides good.


    Year: 2004 Submodel: GT Indianapolis,in

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    December 11, 2011

    Love Eibach!! Handling Is Awesome

    This was the first Mod I did on my Cobra. Had to get rid of that stock 4X4 factory look ASAP. Now my car has a very aggressive stance, and handles like an indy car! These springs where a great compliment to the IRS!!! Performance and looks, what can be better?


    Year: 2001 Submodel: Cobra Santa Cruz CA

    Helpful (1)

  • 5/5

    March 13, 2011

    Sportline springs

    I love these springs. The ride and stance is great. You will need to take bumps and inclines with caution!!!!

    Rob M

    Year: 1999 Submodel: GT

    Helpful (14)

  • 5/5

    Installation Time: Afternoon

    November 18, 2012


    These took me and a buddy 2.5 hours to install this morning. The pictures I have submitted are taken immediately after install, so the springs haven't settled yet but you can notice the definitive drop in ride height. I absolutely LOVE it. I'm expecting about another 1/2" drop up front, and maybe 1/4" rear drop over time as the springs settle in. The stance these springs provide is so very appealing to the eyes. I just can't get over the difference these springs make after install, going from the 4x4 look to the aggressive racy look. The ride quality is exactly what I expected. You feel bumps in the road more, but unlike a lot of people, I enjoy the racy feel of the lowered vehicle more than a ride where you don't feel a thing. If I wanted the ride feel of a sedan, I would have bought a Cadillac, not a Mustang. The handling is excellent as well. A lot less(if any) body roll through corners and freeway on/off ramps. I just can't get over the difference these made. 100% absolutely love these springs, the look, the handling and the feel the car has when driving down the road.


    Year: 2001 Submodel: GT Las Vegas, NV

    Helpful (8)

  • 5/5

    April 27, 2011


    Great stance! I really like the ways these make my car look lower than the profit but not too low! I would recommend these to any Mustang owner!


    Year: 1998 Submodel: GT

    Helpful (4)

  • 5/5

    Installation Time: Afternoon

    December 07, 2011

    These springs are awesome!!!!!!!!!!!

    The Eibach Springs were an excellent upgrade for my stang. it looks great and handles like a dream. other than feeling just about every bump in the road. these spring are a great choice to up the looks and handling on your car. it took me an hour and a half to do the install but i also had a lift. the install was pretty self explanitory. i do recommend new sping isolators when doin the swap i put polyurethane ones in from PROTHANE and i love it. well worth it!!!!!!!!!!!!


    Year: 1999 Submodel: GT Fortb Collins, CO

    Helpful (3)

  • 5/5

    June 30, 2011

    eibach sportline springs

    They made my car look mean, great stance!

    eric d

    Year: 1998 Submodel: GT

    Helpful (3)

  • 5/5

    June 21, 2011


    These springs make for a great look. They also seem to help a the track. No more nose in the air, like with stock.

    Natas LeD

    Year: 2004 Submodel: GT

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    April 09, 2016

    eibach sportlines

    These springs do exactly what you want on your mustang. I really wanted to write this review to let others know the problem I found with my car that caused the initial install to not get the results I wanted . I have read other reviews that some of you also did not get the lowering you expected. I installed the springs and my car looked almost the same as before. I was really ticked because this was the second set of springs I had installed with bad results. The following weekend I replaced my control arms because I found I had bad ball joints. Upon removing the control arms I discovered that both front original coil springs had broken the bottom coil off and the broken piece had rusted and corroded itself into the groove of the old control arms. I had scraped and cleaned the old groove for the spring to rest in and could not detect this problem until I removed the arm and could see it better. I have worked on cars all my life. I was amazed that the broken piece of spring was embedded like it was. After installing the new control arms and my new Eibach sportline springs the car sat 2 inches lower in front. It looks great! I hope this helps.


    Year: 2000 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    August 14, 2015


    Want a BADASS looking pony? Get these springs. Pictures do not do this product justice, as I'm sure every owner will attest. If you are looking to give your mustang a conservative 'slammed' look without running into clearance issues, these are for you. A serious improvement in ride over stock. I rarely got second looks on my redheaded stepchild SN-95, now everyone wants to talk. It's that big of a difference. Don't second guess yourself like I was, well worth $250, especially when hotrod shops want $350 ... Thank you American Muscle, I will be a customer for life.


    Year: 1994 Submodel: Cobra California

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    August 08, 2013


    These springs got rid of that ugly 4x4 stance stock sn95s have and made it look low and mean. although you have to take speed bumps with care the handing it so much. well worth the money


    Year: 1995 Submodel: GT Washington

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    November 18, 2012

    Highly recommend

    Installed in about 2 1/2 hours with the help of a friend. Ran into no problems. Springs fit perfect. I do recommend buying the isolaters as mine were dry rotted. I got exactly 2" of drop right off the jack. Filled up with gas right after and it dropped even more with a full tank. Ride is fine. I can tell a little stiffer when hitting bumps but the overall ride wasn't changed. Great springs!


    Year: 1997 Submodel: GT Alabama

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    September 05, 2012

    (Un)settling Springs

    I bought these springs elsewhere because I didnt want to wait for them to ship and we installed them within a few hours. the install was simple as can be and the outcome was id say a 50/50. The rear end dropped right away and we were thrilled with what we saw. However the front has yet to "settle" and sits maybe a 1/2" below stock ride height. We installed these a month ago and I daily my car and have put hundreds of miles on since the install. The iso's are out so that it at least looks a little lower. Overall i think im going to have to cut them in order to get them closer to where they are supposed to be... Im on the fence to recommending them or not


    Year: 2000 Submodel: GT Cleveland Ohio

    Helpful (1)

  • 4/5

    February 29, 2012

    Eibach Sportline Spring Kit

    The fitment was well off. It looked well and was easy to install.


    Year: 1987 Submodel: Other Malvern P.A

    Helpful (1)

  • 3/5

    Installation Time: Afternoon

    December 30, 2011


    install was painless, the drop looks great, but i now have the infamous "lean" towards the drivers side, springs are positioned right and exactly the same, haven't dug into it again yet though.


    Year: 2002 Submodel: GT

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    September 02, 2011

    Love the look

    This product has greatly improved the look & performance of my car .


    Year: 1990 Submodel: GT Athens ,GA

    Helpful (1)

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