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Ford Performance Lowering K-Springs - Coupe (05-14 GT)

100+ Reviews
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  • Item #24022
  • MPN# M-5300-K

  • Market Price $216.99
  • You Save 17% ($36.00)
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Customer Photos
  • Aggressive Muscular Stance
  • Improves Handling
  • Lowers Center of Gravity
  • Progressive Spring Rate
  • Estimated Drop: Front - 1.5” Rear - 1.5”
  • Fits 2005-2014 GT Coupes
  • Clears Stock and Aftermarket Wheels & Tires.
Improves Handling. Installing a set of progressive rate Ford Racing K-Springs will lower your Mustang's center of gravity, which will reduce squat during acceleration, body roll in the corners, and excessive nose-dive under hard braking. Ford Racing K-Springs are great for daily driving, street, and even occasional track use.

Aggressive Stance. The Ford Racing K-Springs not only improve the handling of your S197 Mustang, but they also improve the overall appearance by lowering the ride height approximately 1.5" to eliminate that nasty raised 4x4 truck look for a more aggressive muscle car stance.

Clears Stock and Aftermarket Wheels & Tires. These lowering springs were engineered to be compatible with your stock 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 four Ford Racing K-Springs are designed specifically for use on the 2005 to 2010 GT Mustangs Coupes. They will also fit 2011 and newer GT Coupes when used in combination with Ford Racing M-18183-C upper strut mounts and M-18000-A dampers (sold separately). Does not fit V6 or convertible models.

Fitment: 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Details

What's in the Box
Hardware included:
  • (4) Springs
  • (2) Strut Boots
Installation Info
Tech Specs
Springs Specifications
Spring Rate: Front: 228 lb/in.
Rear: 199.5 lb/in.
Usage: Street
Year: 2005-2014 Model: GT Coupes
Progressive or Standard: Progressive Estimated Drop: 1.5"F / 1.5" R
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09, 10, 11, 12, 13, 14

Will also fit 2011 and newer GT Coupes when used in combination with Ford Racing M-18183-C upper strut mounts and M-18000-A dampers (sold separately). Does not fit convertible models

Most Helpful Reviews

Ford K Springs

All I have to say was wow! my car looks so sexy, I cant stop staring at it and performance wise, its a blast to drive. I also put kyb struts and shocks that I also purchased at American muscle..I will ...

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Helpful (1)

Looks great, Drives great!

These are the best springs I have ever owned. My car handles great, all the wheel hop is gone at launch, and it looks great too! Plus you have to have faith when installing Ford Racing Parts!!

Helpful (1)

Overall Rating 4.9 out of 5 stars
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11 Questions / 9 Answers

Ask a Question

will these work with Koni STR T? I'm also using gt500 strut mounts.


  • If you have a 2011-2014 Mustang GT as long as you have the Ford Performance GT500 Style Strut Mount Upgrade (05-14 All) item #50273 ( and the Ford Performance Dynamic Shock & Strut Kit (05-14 GT, V6) item #50525 ( If you have the 2005-2010 GT these will work in conjunction with the KONI STR.T Shock & Strut Kit (05-10 All) item #393157 (


    Good Answer (0) (0)

Question Resolved

Can I use only the rear ford racing K-springs ??? I would like to keep my 2013 GT stock on the front end. Thanks


  • Yes you can and they are so much easier to do than the front. You also won't have alignment issues. Most people don't do this because they have to buy all of the parts anyway. Don't over lower the back. Measure before you order so that both ends come out the same height.


    Good Answer (0) (0)

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Will these work well with the Adjustable Ford Racing Handling Package? Wondering if these lowering spring would have any negative effect on the handling packages performance.


  • JMS45 You state that you have some sort of special handling package. but not what it contains. So I will answer your question as if you vehicle is stock. If I mention something that you already have, this is good. When using this set-up, you may not be able to retain proper alignment, as in the camber geometry. So you may need camber bolts. You may need a pan hard bar, to center the rear end. You may or may not need snubbers. Wait until you try out the suspension to see if you need them.. If your shocks are tired replace them. Then a four wheel alignment should finish the job off. Duke7


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Camber, toe question When getting the alignment after installation, are there any special settings which need to be followed on stock tires/ wheels?


  • arms Yes, after installation of this kit, added chamber bolts or plates, checking rear end centering, and checking the condition of ball joints and rod ends. I would seek out an expert alignment center that deals with suspension modification an get a four wheel alignment to keep the vehicle tracking true and the steering wheel centered. except nothing less. Duke7


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Can you still go over speed bumps?


  • These Springs will only lower your car 1.5". That will be perfectly fine for going over speed bumps. Though, if you do have a chin splitter, you may want to approach the speed bumps at an angle, just in case it gets caught.


    Good Answer (0) (0)

Question Resolved

will these spring fit a 2013 v6?


  • Hello, unfortunately the Ford Performance Lowering K-Springs - Coupe (05-14 GT) will not fit the V6 Model, but we do have the correct one for you 2013 V6, Ford Performance Lowering N-Springs - Coupe (05-14 V6)


    Good Answer (0) (0)

Question Resolved

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Customer Reviews (100+) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Full Day

Installation Cost:$250-$500

  • Handling Improvement 4.671642 4.7
  • Ride Quality 4.417911 4.4
  • Appearance 4.820896 4.8
  • Bang For Your Buck 4.880597 4.9

  • 4/5

    Installation Time: Full Day

    May 22, 2013

    Good product and good price

    I installed these springs by myself in about 1 (long) day without ever having done this before. Before this job all I have ever done on my car was change the brake pads/rotors and minor maintenance like change the oil and spark plugs. The stance is much nicer looking and the ride is more firm on hard stops and launches. Some tips on the install: 1. use the biggest wrench you have if you only have hand tools- some of the bolts are trouble. 2. after you have the front or rear on jack stands, use a jack or something to help hold up the rear axle slightly and front struts while you are working - this helps with relieving tension on bolts and other suspension parts. 3. in the rear, be sure not to jack up the car all the way with the factory springs because the lower springs will increase the distance of suspension travel and your jack will not be able to get high enough to get the jack stands out - I had to put the jack on wood blocks to get more height (very dangerous if the blocks give or move). 4. You will almost certainly need an impact wrench to tighten the front strut bolts (one per side) - I got the nuts onto the bolts but after a few turns with a hand tool it just started spinning the strut. There's no good way to hold the strut in place (without possibly damaging it) while you turn the nut. I installed it anyway and drove down the road (very slowly and carfully) to the local mechanic and they tightened it up in about 30 seconds with a few "zings" of an impact wrench. It moved the nut down the bolt about 3-4". Rides great now! Some good install guides online if you do a google search.


    Year: 2012 Submodel: GT The Woodlands, TX, USA

    Helpful (2) (0)

  • 5/5

    Installation Time: Full Day

    November 23, 2012

    K Springs

    These springs are nice. I think the drop is perfect. Fender gap is reduced, but the car isn't slammed. They aren't harsh at all, and they work well with the FRPP dampers and sway bars.


    Year: 2009 Submodel: Bullitt Longview, TX

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    January 23, 2012

    Low is the way to go.

    Simple install if you follow the guide on the page. You will need a front end alignment when finished. Really enhances the cornering and stance.


    Year: 2007 Submodel: GT Bellingham, WA

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    October 28, 2011

    Looks great, Drives great!

    These are the best springs I have ever owned. My car handles great, all the wheel hop is gone at launch, and it looks great too! Plus you have to have faith when installing Ford Racing Parts!!


    Year: 2007 Submodel: GT

    Helpful (1) (0)

  • 5/5

    July 16, 2011

    Ford K Springs

    All I have to say was wow! my car looks so sexy, I cant stop staring at it and performance wise, its a blast to drive. I also put kyb struts and shocks that I also purchased at American muscle..I will always buy from American Muscle..shipping is super fast. I am uber pleased.


    Year: 2005 Submodel: GT

    Helpful (1) (0)

  • 5/5

    February 24, 2011

    !!! Important info for use on 2011 GT's

    The following info is from personal experience of a guy with more than 35 years of wrenching experience. If you want to use the "K" springs on the 2011 GT, read the FRPP catalog carefully. The M-18000-A struts/dampers and the FRPP M-18183-C strut mounts are a package deal - not a menu deal. The 2011 strut "perch" is different, and the mounts are taller, so the 2005-2010 struts do not seat properly on the stock mounts. Oh, you will read on the 'Net that they work fine, and Ford is not clear on this point, but after we did all the work, we found that using the "K" springs with the stock mounts allowed too much play, and did not bode well for long-term stability/safety/wear. After numerous calls to FRPP, here is the right setup for the 2011 GT: 1) 5300-K springs 2) M-18183-C strunt mounts 3) M-18000-A struts/dampers Once you get all these installed correctly, the end result is very sweet: greatly reduced sway, crisp turn-in, greatly reduced nose-dive under braking, and sharper handling all around. The car also looks great with the 1.5" drop! Looks both smaller and meaner, as a sports car should look. Ride is a bit choppier, especially if you decide to ignore these recs and stay with the stock dampers - they are not setup for the taller 2011 strut mounts. FRPP should be clear in their catalog that the 3 parts are required; when I read the first 2011 catalog and spoke to someone at FRPP, it seemed that the dampers were considered a enhancement; no, they are required to make the whole package work right and be safe. Thanks to Steve Horn at Ford Racing Perf Parts for helping me sort this out - I had to eat the double labor time though. Hope this helps.


    Year: 2011 Submodel: GT

    Helpful (46) (5)

  • 5/5

    May 08, 2010

    Ford stock vs Ford K spring

    The Ford K springs are worth the money. The ride is much firmer the car looks better and the awful body roll when cornering has been substantially reduced. Beware that lowering the car 1-1/2" makes curbs, humps and holes more hazardous to the low points under the car. I have a couple of scrapes after 2 weeks. Fitting the springs yourself is straight forward and the online instructions are very accurate. Depending on the equipment you have and the skill level it could take longer than the instructions indicated. I would allow at least 3 hours. Getting the old parts off takes more time than putting the new parts on. Compressing and decompressing the stock springs was time consuming with the $10 spring compressors from Harbor Freight Tools. I think that the addition of stiffer shock absorbers would also improve the cars handling and see them as a future purchase. One final point the ride is harder so if you like a softer ride and take corners like an old lady these are not for you.

    Dave H

    Helpful (33) (3)

  • 5/5

    May 17, 2011

    Soooo Easy

    These springs are great! They dropped the car just perfect. Not so low that you have to worry about scraping your undercarriage on everything. The ride is a little bit stiffer but the handling gain is well worth it. Install was sooo freakin easy! It took about 1 1/2 hours with 3 of us taking our time. You wont regret going with these springs. They will clear 285/40/18's no problem, they leave just enough room that you could go with a little bit taller tire. I hope this helps!


    Year: 2011 Submodel: GT

    Helpful (22) (0)

  • 5/5

    October 22, 2010

    Great Look

    These springs gave my car the aggressive look that I was looking for. Best of all, they ride great and perform extremely well. Very Satisfied!!!


    Helpful (13) (0)

  • 5/5

    November 06, 2010

    2009 Bullitt with Ford Racing Lowering Springs

    I love these springs! I chose to go with the Ford Racing Springs over all the others because numerous shops told me they ride the best out of all the lowering springs out there and will give it a very aggresive stance. I also chose to go with the Ford Racing Springs because the Bullitt has some Ford Racing parts on it from the factory. It is a must have, aggresive stance good ride, and good price. What more can you ask for?


    Year: 2009

    Helpful (13) (1)

  • 5/5

    March 22, 2010

    perfect height and ride

    These springs gave me the perfect drop. It's still clean and classy, but really meated up the stance. Ride is fantastic, road feel much better, and bumps are actually more pleasant since there's less play in the susp. Handling is great too! I included Tokico shocks and struts and the Max. Motorsports camber plates. Also have Steeda strut bar. All together perfect!


    Helpful (2) (1)

  • 5/5

    Installation Time: Afternoon

    September 12, 2011

    Lookin' Good

    Quit contemplating, buy them already! Straight forward install on my 2011 GT/CS, which came stock 19" wheels. Installed by myself in a few hours, having really no idea what I was doing, just following a popular how-to on line. If you have a decent set of tools and mechanical inclination, you'll have no problem. I'd say air tools are a must for removing the strut nuts. No spring compressor needed with the front of the car raised. Love the improved look and less body roll. I am currently using all stock parts (struts, strut mounts, pan hard bar) with zero issues. No clicks, no clunking or wierdness. My local alignment shop only charged me an inspection fee, because everything was still well within spec! Definitely stoked!


    Year: 2011 Submodel: GT

    Helpful (8) (0)

  • 5/5

    August 18, 2009

    Ford Racing K-Springs

    Great product, easy to install, and look great on my 07 GT. Fills the fender wells nicely with the 18x10 285-40s and 18x9 255-45s, also purchased at AM. Thanks

    Robert W> Carroll

    Year: 2007 Submodel: GT

    Helpful (9) (1)

  • 5/5

    March 17, 2010

    perfect drop

    mine is the blacked out with the passenger side spoiler with the black saleens. i installed them with minimal help in an afternoon and im a novice. perfect height and much improved handling. great buy.


    Helpful (5) (0)

  • 5/5

    Installation Time: Afternoon

    August 16, 2012


    What a difference in appearance. The Install time was minimal and easy. It lowered the car 1&1/2 inches and looks like an American Muscle car should. this also reduced the squatting during launch as well as wheel hop tremendously. thanks again A/M.


    Year: 2011 Submodel: GT

    Helpful (3) (0)

  • 5/5

    January 01, 2010

    Ford K Springs

    These are a great deal. Easy install. Ride quality is a little firmer/bouncy with the stock struts (some Tokicos wil fix that). Drop height is just right. I have a CDC Classic chin spoiler. I was worried that the spioler would have clearance issues, but all is well. The spioler was dropped by 1/2 in. These springs really give the Stang some attitude!


    Helpful (4) (1)

  • 5/5

    May 23, 2011

    Ford Racing Lowering K-Springs

    I added new rimes and tires and it became evident that car sat to high. Really gives the car an aggressive look.

    Brian C

    Year: 2011 Submodel: GT

    Helpful (2) (0)

  • 5/5

    May 22, 2011

    worth every penny

    i had them on in about 2 hours easy install there is no wheel hop whatsoever either, if you dont have these for your s197, you need them


    Year: 2010 Submodel: GT

    Helpful (2) (0)

  • 5/5

    October 27, 2010

    FRPP K Springs

    I installed these with Koni shocks and struts! The ride is awsome! Soft and tight! It does lower the car quite a lot though! Anyways since this is a quality rating I'll give it 5 stars!


    Helpful (2) (0)

  • 5/5

    October 29, 2009

    Lowering Springs

    This is the perfect drop for my 07 GT. Fills in the fender walls very nice. If you decide to get lowering springs get new shocks and sturts too. I bought the Tokico shocks and struts with these springs and what a difference it makes.


    Year: 2007 Submodel: GT

    Helpful (2) (0)

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