Steeda S550 Mustang Clutch Spring Assist 35 lb/in All (2015-2020)

84 Review(s)
$5.00 (20%)
Your 2015-2019 Mustang comes with a 185 lb/in clutch assist spring installed from the factory. This high-rate spring is what causes such a vague and disconnected clutch pedal feel.
Part Number: 555 7022
Write a Review

Suggested Mods


Your 2015-2019 Mustang comes with a 185 lb/in clutch assist spring installed from the factory. This high-rate spring is what causes such a vague and disconnected clutch pedal feel. The clutch pedal travels in a circular arc, with the spring assist in the middle of that clutch pedal travel. The middle of that motion compresses the spring initially and then allows it to extend after the first 30 degrees of travel. The combination of a high-rate assist spring and motion of the pedal during engagement causes a non-linear and sometimes confusing pedal feel. Having a non-linear pedal feel makes it hard to modulate the clutch on your Mustang GT, EcoBoost or V6.

Many new Mustang owners have found that taking out the stock OE spring will give you somewhat similar results, but realistically the clutch becomes far too heavy especially if your Mustang is daily driven. Most owners fail to realize the prolonged effects of simply taking out your factory OE spring and not replacing it with another spring. By negating your factory clutch assist spring you will notice chatter/NVH from your clutch pedal. Your clutch pedal will never fully return to stock position without any assist spring, and over time your slave cylinder may begin leaking due to constant pressure on its seals from the clutch pedal not returning to the stock position. Avoid these problems in the future by installing our Steeda S550 Mustang Clutch Assist Spring 35 lb/in into your GT, EcoBoost or V6.

Our Steeda S550 Mustang Clutch Assist Spring 35 lb/in completely replaces the factory 185 lb/in assist spring. Our engineers have honed in on just the right amount of spring rate to get you the perfect clutch pedal feel you look for in a Mustang. This assist spring is manufactured from piano wire that naturally has high tensile strength and high elastic qualities. Our piano wire spring ensures a consistent spring rate and minimal sag even after repeated use. With the addition of our clutch assist spring, you will notice a much more linear feeling clutch - the reason being is that we take out much of the influence involved in your clutch pedal motion caused by the assist spring, allowing you to feel exactly what is happening with your clutch engagement.

Purchase your Steeda S550 Mustang Clutch Assist Spring 35 lb/in for your 2015-2019 Mustang GT, EcoBoost or V6 at Steeda Autosports today!

Note: Will not fit 2019-2020 GT350. Clutch spring may be incompatible Ford Performance M-9452-M8 no-lift shift strategy.

Looking to purchase the Steeda S550 Clutch Spring Assist and Spring Perch kit? Click here for part # 555-7027

Product Benefits
  • Improve clutch pedal engagement feel
  • Modulate your clutch engagement with ease
  • Piano wire construction with high tensile strength and high elastic qualities
  • Consistent spring rate and minimal sag even after repeated use
  • More linear clutch feel
  • Complete replacement of factory 185 lb/in clutch assist spring
  • Avoid slave cylinder damage due to removal of stock clutch spring
  • Steeda quality, backed by a lifetime warranty

CA Residents: Cancer and Reproductive Harm WARNING

Fitment & Features


Manufacturer: Steeda Autosports

Installation Information:

Level of Difficulty: Easy
Install Time: About 30 Minutes
Tools Required: Basic Shop Tools
Print Instructions:

Vehicle Fitment:

Fits Model Year: 2015, 2016, 2017, 2018, 2019, 2020

Customer Reviews

Rating Snapshot

Select a row below to filter reviews.


Average Customer Ratings


Small Part, Big Difference
I purchased one of these for the same reason everyone does; the feel of the clutch pedal in an S550 is "weird". I was skeptical about whether this product was worthy of the praise it has received, but I'm very happy that I have this in my car because it did exactly what I hoped it would. The sudden upward "lurch", when letting out the clutch, is gone now. Thanks Steeda!!
Did you find this helpful?  1 of 1 Found Helpful
from Everett on 8/30/2020
Clutch Spring Assist
I didn't I was going to like, as I got to used to the way my GT350 handled. But, after two days of driving it, I was enjoying it even more. It feels so much better now, especially starting from 1st gear. Plus, it only took me three minutes to replace it!
Did you find this helpful? 
from Texas on 8/27/2020
Just installed the Steeda clutch spring (replacing the oem part - super easy... depress clutch pedal with left hand and pop out spring assembly toward brake pedal with right hand, install new spring in reverse...easy to compress). Amazing upgrade. Clutch pedal is a little stiffer but I can completely feel and gauge the clutch engagement and disengagement much better. Shifting much quicker now and with greater left/right foot coordination too. Combined with the Steeda Tri-Ax Race shifter I installed last month, my GT driving experience has truly elevated. Highly recommend both upgrades. See my writeup (71Rcode is my username) on the site under the post "Very impressed with Steeda clutch spring" for more info.
Did you find this helpful? 
from Flower Mound on 7/9/2020
Steeda clutch spring
Makes a big difference in drivability and clutch modulation is much better! Easy cheap upgrade that makes a big difference!
Did you find this helpful? 
from Killeen on 6/27/2020
Worth every penny I had one of the Steeda springs on my Focus ST, it was great as well. I ordered this while they were finalizing the paperwork on the loan for my Mustang. The factory spring is awful, no engagement feel difficult to modulate, this fixes it and drastically increases driving enjoyment.
Did you find this helpful?  1 of 1 Found Helpful
Verified Buyer   from Camas WA on 6/3/2020
Simple, elegant, effective solution
This is a must have upgrade for manual transmission mustangs. Following Steeda's instructions, it took me about 10 minutes to install on my 2017 Shelby GT350 (including unwrapping it and putting everything away when I was done). It's just as the description and other reviews state - the factory setup is non-linear, there is more "assistance" force applied to the second half of the pedal range of motion (as it's being depressed) and the extra force kicks in just at the same spot as the clutch engagement point. So on releasing the clutch, it pops up a bit just as it bites making it difficult to be precise and creating an unnatural feel. The replacement spring makes the clutch action entirely linear so that even force is applied throughout the range of motion. Now it feels like it should. It's so easy, so simple and so inexpensive, everyone should do this upgrade.
Did you find this helpful?  2 of 2 Found Helpful
Verified Buyer   from Connecticut on 7/7/2019
Installation in under 5 minutes
Use needle nose vise grips to compress two coils on the factory spring and the top will pop right out. I don't know why people say that you might break the factory perch. There was no stress on it whatsoever. I think it actually took about 45 seconds from start to finish. The pedal is supposed to be a little stiffer after replacing the spring but it really wasn't noticeable. The part that was noticeable was the 'feel' of the pedal. This is an improvement over the factory spring. Now it's much easier to feel the bite point resulting in smoother operation. Also, I think it will make it a lot easier to teach my wife and/or kids how to drive a manual by reducing their chance of stalling the car.
Did you find this helpful?  5 of 5 Found Helpful
Verified Buyer   from Connecticut on 2/23/2019
Hard to remove easily installed
I just could not get the needle vise grips to work so I had to cut the spring off,also had to use both hands to install but I like the peddle better through it feels a little harder to push in,I feel I can conterl the realise much better,I would recommend
Did you find this helpful?  2 of 2 Found Helpful
Verified Buyer   from Bloomfield on 1/7/2019
Awesome! Best mod for the price!
Wow! This clutch spring made such a huge difference in the clutch feel and engagement. I'm so glad I didn't wait too long to install this in my 2018 Mustang GT . This is the cheapest best mod you can do. Check out my video review on YouTube, search for channel High Rev.
Did you find this helpful?  1 of 1 Found Helpful
from on 8/12/2018
2017 mustang
Does everything it says it does. Car is much easier to drive now. Money well spent
Did you find this helpful? 
from ORLANDO on 7/31/2018
Even an old guy can install it
I bought this spring last fall but just got around to installing it today, now that the snow has finally melted. I used a piece of wood to hold the clutch pedal down, so I could use both hands to get the old spring out. Other than not being able to work under a dash as well as I could 50 years ago, the installation was easy., thanks to the good instructions. A little more effort to depress the clutch, but easier to engage it smoothly.
Did you find this helpful?  2 of 3 Found Helpful
from Bismarck, ND on 5/5/2018
Big improvement
When i removed the old spring i couldn't compress it with both hands. It is unbelievable to me how ford thought their design was acceptable, its as if they never bothered to drive it. This spring is much softer, the clutch pedal is no longer pushing against my leg when i am trying to feel the biting point. Personally i would by an even softer spring if it was available but this one is 100% better than what ford put in there, its no longer live driving a tractor. My opinion is that you only need to buy the spring unless of course you break the other pieces during installation.
Did you find this helpful?  1 of 1 Found Helpful
from Texas on 3/16/2018
Clutch pedal spring review
I'm not sure I knew what to expect. The pedal feel is a little lighter and the transition is a bit easier to feel. The big improvement that I did notice is that I've improved my timing of clutch disengagement to gear change timing. The shifts are much more fluid now. I attribute that to the new spring. Good job Steeda!
Did you find this helpful?  2 of 2 Found Helpful
from Guthrie on 1/22/2018
Thanks Steeda
Clutch pedal was tough to modulate on my '16 GT because of the giant stock spring. Steeda's 35 lb spring solution worked like a charm and was eay to install.
Did you find this helpful?  1 of 1 Found Helpful
from Texas on 1/9/2018
More linear feel, excellent quality!
Install is super easy. Take needle nose pliers, grip the stock spring and compress in the middle, then twist and pull out. The Steeda spring can by placed back in without a tool since it's much softer and compresses easily. Initial impressions. The pedal is definitely stiffer when pushed in, but when released the feel is much more progressive and linear, the softer release allows smoother engagement. I can see why Ford used the stiffer spring since it helps reduce clutch pedal effort when pushed in, but they went too far with a 150 ft-lb spring since you have to fight the clutch pedal on release and not let it come back too fast. With the Steeda spring, you feel like you're actually releasing the pedal yourself, rather than pushing against a strong force as in the case with the stock spring. Overall, a great product and well worth the price. One caveat is that people who like a softer clutch pedal, where it's easy to push in and springs back up quickly, may not appreciate the change. Those who like to drive smoothly and appreciate more of a linear engagement point will love it. The Steeda feel is similar to how the clutch feel was like in previous gen Mustangs.
Did you find this helpful?  6 of 6 Found Helpful
from Canada on 12/13/2017
I absolutely love the clutch feel with this installed! Shifts are smooth and the vague feel is gone! Install was easy in about 5 minutes. I could've done it faster but was being careful not to break the stock top and bottom caps since I was going to reuse them. Wish I would've done this sooner.
Did you find this helpful?  1 of 1 Found Helpful
from Stillwater on 10/16/2017
Love the product
Did you find this helpful? 
from houston on 6/16/2017
Absolute MUST
A must for any 6 speed s550... Installation takes 10 min... There is no difference in the weight of the clutch, but the grabbing point becomes MUCH more apparent than with the vague stock spring
Did you find this helpful?  1 of 1 Found Helpful
from laurelton on 6/10/2017
Cheapest/Easiest Mod To Improve Driveability
As the title suggests, this spring is probably the easiest, cheapest thing you can do to significantly improve the feel of your clutch, and overall driveability of the car. there are no more lurches during shifting, it's easier to take off from a stop, and the clutch overall just feels better. I did chip a piece of the top perch's ear during removal, but it didn't impact the perch's ability to stay in place when reinstalled. The only downside I could really give to this spring is that it gives the clutch pedal a bit more free play than the stock spring. It's perfectly normal and won't hurt anything, it just worried me a bit at first, because it wasn't something I was used to, or have ever felt in any of the manual cars I've driven. This could be remedied by just adjusting the pedal, but I don't think I'll even bother doing that because it really isn't an issue. Overall, this is a must have for any S550 owner with a 3rd pedal!
Did you find this helpful? 
Verified Buyer   from on 5/30/2017
Steeda, you've done it again!
This spring definitely lets me feel the disengage and engaging of the gears when shifting 100 times better than the factory spring. It's a perfect 2 minute install mod. Steeda, you've done it again!
Did you find this helpful? 
from on 1/17/2017
Must-have item
I was skeptical but after reading the reviews I purchased literally installed it in less than 10 minutes cannot say enough about what this spring does for the clutch literally night and day between the factory spring and Steeda spring if you're hesitant don't be if you're a driver it's a must-have item
Did you find this helpful?  0 of 1 Found Helpful
from Georgia on 12/14/2016
This is a must have item.
This is a must have item. Clutch now feels like it supposed to feel. We waited a long time for this fix.
Did you find this helpful? 
from Florida on 12/12/2016
I can't believe how much this improved the clutch feel.
I can't believe how much this improved the clutch feel. Usually mods come with pros and cons, increased NVH etc, but this is amazing! I've never changed something so cheap and had such a great impact on the way the car drives. The clutch comes back better, you can feel the change in pressure during engagement, and it is so much easier to drive smoothly.
Did you find this helpful? 
from Alabama on 12/10/2016
The best mod for such a cheap price
Amazing how such a small thing improves drivability. No more inconsistent shifting and launching. Clutch is always the same every time. The best mod for such a cheap price
Did you find this helpful? 
from Nevada on 12/5/2016
Feels much, MUCH smoother.
I just installed this on my 2013 GT. I was able to do it without the needle nose vice grips in about 10 minutes. Would have taken less than two with them, but whatever. I snuck some zip ties through the stock spring, and with the clutch engaged (pedal all the way up) I tightened the heck out of em'. Only felt like putting 3 on the stock one due to how much of an awkward spot it's in, then just follow the directions, prying down on the upper retainer with a flat head screwdriver to drop it out of the slot. Install a few zip ties to the new one, squeezing the spring to tighten the zip ties as much as possible. Put the spring retainers on, slipping the bottom one over the lower mounting pin, and with some of the spring stroke compressed already, you should be able to squeeze it down that last bit to slip the whole unit together. Just remember the pedal has to be completely pushed in/down to facilitate removal of the old spring, AND to get the new one in. If you have a pedal holder I imagine it would be even easier. Now just snip off the zip ties and pull em' out and you're ready to go. I haven't actually driven with it yet, but I did hop in and feel it. Feels much, MUCH smoother. No more awkward resistance right in the middle of the pedal travel. It also might be all in my head because of how much smoother it is, but I think the clutch is even a little softer too, which is nice for someone like me who drives roughly 70-90 miles a day, often in rush hour traffic. You really can't beat it for 10 bucks. If you have needle nose vice grips I'm sure that's the way to go, much quicker. But if you don't have any on hand, but have about half a dozen zip ties- that^ is how you'll save a trip to the auto part store.
Did you find this helpful? 
from Virginia on 12/2/2016
There are no reviews for this product!

Related Items

Back to TOP
0 Items