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Vendor ST Suspensions - ST XA Adjustable Coilover Kit - Tesla Model Y - New Pricing!

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tom @ eas

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Oct 11, 2021
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Anaheim, CA
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For all those who want to influence more than just their ride height. ST XA Coilovers deliver the look you need through a wide range of height adjustment. With an extensively adjustable damper setup, you can precisely adjust the driving behavior of your car to achieve enhanced road control without a compromise in comfort.

EAS is an authorized KW & ST Suspensions dealer - ready to ship immediately or install at our 8000sq ft facility in Anaheim, CA.

XA - More than just lowering
For all those who want to influence more than just their ride height. ST XA Coilovers deliver the look you need through a wide range of height adjustment. With an extensively adjustable damper setup, you can precisely adjust the driving behavior of your car to achieve enhanced road control without a compromise in comfort.

Features
  • Front Lowering: 1.0" to 2.0"
  • Rear Lowering: 1.0" to 2.0"
  • 18 Distinct clicks of Adjustable Rebound Damping
  • Individual lowering within the tested adjustment range
  • Front and rear axle thread adjustment (when possible)
  • Galvanized coilover struts with additional coating for optimized corrosion protection
  • Complete solution with adjustable spring perch, multi-coated spring system and dynamic elastomer bump stops with dust protection
  • Powerful twin-tube dampers with high-quality components for maximum longevity
  • Backed by ST suspension's 5 Year Unlimited Mileage Warranty

Individually Height Adjustable
ST XA Coilover kits deliver precise adjustment to your ride height and look of your car. We manufacture the adjustable spring perch made of durable and friction-optimized polyamide composite material with a stainless steel insert. Thanks to the composite material corrosion is prevented between the strut and perch ensuring long lasting height adjustability while the stainless steel insert provides strength and confidence!

Control The Details
More control of the driving dynamics thanks to adjustable KW rebound technology. ST XA Coilovers come preset to our factory recommended damper settings, the same configuration we test them at on our KW shock dynos before they go into your box. The 18 distinct clicks of adjustable rebound damping allow you to refine the driving dynamics with a simple turn of the adjustment knob. Each kit includes a detailed damper setup manual making it easy to reset to our recommended setting at any time. Whether your preference is comfort, sportiness, or something in between; ST XA puts the finer details of the driving dynamics in your hands.

Closed Rebound Stage - Sporty, tight and maximized performance
Turning the adjustment knob to the right, you increase the rebound force and achieve tighter handling. High rebound forces (closed rebound) improve the handling response, this is especially noticeable on the front axle; the response is a direct and unadulterated sporty experience. This closed rebound stage is ideal if you enjoy spirited drives, long curved banks, canyon carving, and more.

Characteristics at a closed rebound stage:
  • More direct steering
  • Improved handling
  • Pitch and roll movements of body are greatly reduced
Opened Rebound Stage - Retained comfort with added sportiness
Turning the adjustment knob to the left your ST Coilover suspension will provide a much smoother ride and improved ride comfort compared to standard shocks and lowering springs. This is ideal when driving on uneven and rough roads by helping to absorb road frequencies. The opened rebound stage takes ride comfort to the next level.

Characteristics at opened rebound stage:
  • Increased rolling comfort
  • More driving comfort
Galvanized steel struts, low friction materials with layers of protection
Galvanized zinc coated steel struts optimize corrosion protection for long lasting use. We add a dust protection system to prevent unwanted dirt and particulate from coming in contact with the hardened chrome piston rod or getting into the valve packs. We reinforce the system with a multi-layered pressure resistant sealing package, mono block guide system and a low friction piston band which works inside the pressure resistant internal damper housing.

Unique Features
The high quality ST XTA Coilovers have numerous unique features that provide unparalleled value and a long lasting durability.
  • Composite Spring Perches
  • Two-Piece Racing Spring System
  • Dust Protection and Weather-Resistant
KW Quality – exclusively for ST suspensions
The ST suspensions coilovers benefit from our many years of experience in the development and production of suspension components for motorsport and the street. Each damper is hand assembled specifically for your order and put through rigorous quality control testing before being placed in your box for delivery.

Vehicles Supported
Tesla Model Y, including Performance
 
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ST Suspension coilovers have arrived and build quality is fantastic. Aluminum fork like the KW V3 and dampening adjustment made this a very budget friendly kit for those looking to soften the ride and lower the ride height considerable over what springs-only can provide.

Only a few kits in stock, get yours now!

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ST just slashed pricing across the board, making these among the best priced coilovers on the market today! Kits are in stock, ready to ship to install.

 
Since there are absolutely 0 reviews on the ST XA Coilover Kit for Model Y, I think it is my responsibility to get the word out on this amazing, yet affordable Model Y coilover kit. Thanks @tom @ eas for recommending them to me. My primary goal was to increase comfort over pothole ridden roads, secondary goal was to drop the car 1”. Comfort is really subjective, most people write rave reviews for suspensions without trying other setups, so it’s hard to take their reviews seriously because they only compare them to the stock suspension. I’ll set my base comfort at 100% for the stock 2023 MYLR comfort suspension and compare from there.
1st setup:
Stock 2023 Comfort suspension + 19” Geminis = 100% comfort level
2nd setup:
Tein Endurapro Plus ($600) set to 10F/12R + Stock 2023 MYLR Comfort Springs + 19” Gemini = 200% comfort level
*Note: Tein softness goes all the way to 16, but the max softness I could set was 10 front, 12 rear, because any higher than that and big dips were amplified, the car would rock back and forth 8 times before settling vs 2 rocks on the 10F/12R setup.
3rd setup on a friend’s MYLR:
Stock 2022 MYLR Springs and Shocks + 18” aftermarket wheels = 200% comfort level *Note: Crazy how reducing the rim size by 1” made his ride as comfortable as mine with the upgraded Tein shocks.
4th setup:
ST XA Coilovers ($1550) set to -1” drop, 18F/18R + 19” Replica TE37 wheels 19x9.5 +35 with original tires swapped over from the Gemini wheels + Whiteline rear camber arms ($200) = 250% comfort level
*Note: I was surprised and pleased that the rear of the car didn’t rock back and forth after hitting a big dip in the road.
These ST XA Coilovers are pretty much the same price of the MPP fixed coilovers so I’ll directly compare these two.
Build Quality:
ST and MPP have the same build quality, they are both manufactured by KW and I assume they share the same parts. The fork, body, bump stops, and dust cover are identical.
Warranty:
ST 5 years, MPP 2 years
Drop range (MYLR):
ST 1-2”, MPP 0.62-2.39”. I drive around at the max height of -1”. The stock 2024 M3 ground clearance is 5.4”, MYLR is 6.8”, so my drop puts me at 5.8”. I have cleared all driveways and speed bumps without scraping as far as I know. I am however scraping my front mudflaps on

pretty much every driveway and speed bump. I found some short mudflaps on aliexpress that I will be installing later.
Differences:
ST includes aftermarket front top hats so you don’t have to compress the springs to swap in the OEM top hat, MPP makes you use your OEM top hat.
ST has 18 clicks or rebound adjustment (There are no compression adjustments), I don’t know exactly what this means, but just changing the rebound makes the ride stiffer or softer, I’m not sure adjusting the compression would be helpful. MPP is fixed damping set to the most comfortable.
Tom says you can adjust the ST XA coilovers ro ride with similar comfort to the MPP option.
Final thoughts:
I’d recommend these ST XA Coilovers for comfort over any shock+spring combo anyday.
If you are deciding between these and MPP adjustable coilovers, you might as well buy these, they provide similar adjustability at half the price.
If you are deciding between these and MPP non-adjustables, you might as well buy these as they are a tiny bit cheaper, they come with a convenient aftermarket top hat and are adjustable if you ever want to make your car stiffer.

And some pictures because whynot?
 

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Since there are absolutely 0 reviews on the ST XA Coilover Kit for Model Y, I think it is my responsibility to get the word out on this amazing, yet affordable Model Y coilover kit. Thanks @tom @ eas for recommending them to me. My primary goal was to increase comfort over pothole ridden roads, secondary goal was to drop the car 1”. Comfort is really subjective, most people write rave reviews for suspensions without trying other setups, so it’s hard to take their reviews seriously because they only compare them to the stock suspension. I’ll set my base comfort at 100% for the stock 2023 MYLR comfort suspension and compare from there.
1st setup:
Stock 2023 Comfort suspension + 19” Geminis = 100% comfort level
2nd setup:
Tein Endurapro Plus ($600) set to 10F/12R + Stock 2023 MYLR Comfort Springs + 19” Gemini = 200% comfort level
*Note: Tein softness goes all the way to 16, but the max softness I could set was 10 front, 12 rear, because any higher than that and big dips were amplified, the car would rock back and forth 8 times before settling vs 2 rocks on the 10F/12R setup.
3rd setup on a friend’s MYLR:
Stock 2022 MYLR Springs and Shocks + 18” aftermarket wheels = 200% comfort level *Note: Crazy how reducing the rim size by 1” made his ride as comfortable as mine with the upgraded Tein shocks.
4th setup:
ST XA Coilovers ($1550) set to -1” drop, 18F/18R + 19” Replica TE37 wheels 19x9.5 +35 with original tires swapped over from the Gemini wheels + Whiteline rear camber arms ($200) = 250% comfort level
*Note: I was surprised and pleased that the rear of the car didn’t rock back and forth after hitting a big dip in the road.
These ST XA Coilovers are pretty much the same price of the MPP fixed coilovers so I’ll directly compare these two.
Build Quality:
ST and MPP have the same build quality, they are both manufactured by KW and I assume they share the same parts. The fork, body, bump stops, and dust cover are identical.
Warranty:
ST 5 years, MPP 2 years
Drop range (MYLR):
ST 1-2”, MPP 0.62-2.39”. I drive around at the max height of -1”. The stock 2024 M3 ground clearance is 5.4”, MYLR is 6.8”, so my drop puts me at 5.8”. I have cleared all driveways and speed bumps without scraping as far as I know. I am however scraping my front mudflaps on

pretty much every driveway and speed bump. I found some short mudflaps on aliexpress that I will be installing later.
Differences:
ST includes aftermarket front top hats so you don’t have to compress the springs to swap in the OEM top hat, MPP makes you use your OEM top hat.
ST has 18 clicks or rebound adjustment (There are no compression adjustments), I don’t know exactly what this means, but just changing the rebound makes the ride stiffer or softer, I’m not sure adjusting the compression would be helpful. MPP is fixed damping set to the most comfortable.
Tom says you can adjust the ST XA coilovers ro ride with similar comfort to the MPP option.
Final thoughts:
I’d recommend these ST XA Coilovers for comfort over any shock+spring combo anyday.
If you are deciding between these and MPP adjustable coilovers, you might as well buy these, they provide similar adjustability at half the price.
If you are deciding between these and MPP non-adjustables, you might as well buy these as they are a tiny bit cheaper, they come with a convenient aftermarket top hat and are adjustable if you ever want to make your car stiffer.

And some pictures because whynot?
Appreciate the review - good to hear this since you can speak from firsthand experience and in comparison from the OEM and Tein/Koni/Eibach setups. Comfort can be had, as well as those looking for a sportier feel - all from the same setup with some quick adjustments.

It's good to see people finally warming up to the ST Suspension setups, it's very aggressively priced and not much more than those piecing together Koni/Teins with a set of lowering springs, which is fine for those on a budget The ST Suspension Coilovers even beats the MPP Comfort kits SALE price.

Why not have a complete suspension setup with dampening and height adjustment, 5 year warranty and new replacement front strut mounts included? It's quite honestly the best street kit on the market from a recognized manufacturer. Win-win.
 
What’s the lowest you recommend I drop this without compromising my battery? MPP suggests the lowest battery height to be 135mm which equates to a 1.5” drop with a ground clearance of 5.3”, even though their coilovers have the ability to drop 2.49”. I should be able to clear speed bumps easy, but I’m worried about various sized driveways. For comparison, the 2024 model 3 performance has a ground clearance of 5.0” and model 3 2018-2023 is 5.4”. So I’m thinking I should be fine. The main thing I want is to take any driveway head on and not have to come it at weird angles, I just want to pummel through them business as usual.
 
What’s the lowest you recommend I drop this without compromising my battery? MPP suggests the lowest battery height to be 135mm which equates to a 1.5” drop with a ground clearance of 5.3”, even though their coilovers have the ability to drop 2.49”. I should be able to clear speed bumps easy, but I’m worried about various sized driveways. For comparison, the 2024 model 3 performance has a ground clearance of 5.0” and model 3 2018-2023 is 5.4”. So I’m thinking I should be fine. The main thing I want is to take any driveway head on and not have to come it at weird angles, I just want to pummel through them business as usual.
The height is correct, but clearance will depend on your driving habits - as with any lowered vehicle, you will need to take speed bumps/driveways a little slower. Otherwise, you shouldn't have any issues.
 
The height is correct, but clearance will depend on your driving habits - as with any lowered vehicle, you will need to take speed bumps/driveways a little slower. Otherwise, you shouldn't have any issues.
Nah man, I pump through speedbumps and driveways with gusto at even greater speed! The shocks eat em up so much better, all I feel is a soft clunk instead of being thrown around like a rag doll. I’m currently riding at a 1” drop with 5.8” ground clearance, it’s 0.5” lower than a MYP, but still well above most sedans
 
I went ahead and dropped the car another 0.5” making the total drop 1.5”. I expected the car comfort to decrease, but the strangest thing happened, the car seems to have gotten slightly MORE comfortable. I’m guessing the stiffer portion of the front progressive springs engage earlier, so it bounces the car back faster making the car less bouncy. For example, after hitting a big bump at -1” height, the car would wobble 3 times before stopping (estimated side-to-side wobble movement: 2”, 1”, 0.5”), at -1.5” it wobbles 2 times with lesser intensity (estimated wobble: 1”, 0.5”). The people at KW are frikkin WIZARDS, a car should not get MORE comfortable the lower you drop it! I’m riding at fully open 18 clicks on the soft side front and back. Now I need to find someone with comfort tuned Ohlins to ride along and compare.
 
@tom @ eas installation question, I’ve read that after lowering the car, you need to loosen all the suspension bolts, then preload the spindle with a jack until it slightly lifts the car so the spindle can be near ride height, then retorque at ride height.

Is there any truth to this? It makes sense that if you lower the car, the rubber grommets attached to the spindle would be flexed constantly.
 
@tom @ eas installation question, I’ve read that after lowering the car, you need to loosen all the suspension bolts, then preload the spindle with a jack until it slightly lifts the car so the spindle can be near ride height, then retorque at ride height.

Is there any truth to this? It makes sense that if you lower the car, the rubber grommets attached to the spindle would be flexed constantly.
This is correct.
 
So these plastic adjustment collars are pretty weak, I broke 2 corner pieces on the front drivers side. If you don’t hold it in the perfect position, the metal C-tool will slip and break off a corner. Eventually I’ll break all corners and will have to compress the spring in order to adjust height. Pretty terrible design. MPP uses the same cheap plastic collars, so I don’t know if I can recommend these or even MPP anymore, probably better to stick with coilovers with metal locking collars. I also stripped the set screw to keep the collar from turning, that part isn’t really necessary though, the threads are super weak plastic, very easy to strip using 1lb of torque with my fingers. The plastic locking collars might be a deal breaker though.
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So these plastic adjustment collars are pretty weak, I broke 2 corner pieces on the front drivers side. If you don’t hold it in the perfect position, the metal C-tool will slip and break off a corner. Eventually I’ll break all corners and will have to compress the spring in order to adjust height. Pretty terrible design. MPP uses the same cheap plastic collars, so I don’t know if I can recommend these or even MPP anymore, probably better to stick with coilovers with metal locking collars. I also stripped the set screw to keep the collar from turning, that part isn’t really necessary though, the threads are super weak plastic, very easy to strip using 1lb of torque with my fingers. The plastic locking collars might be a deal breaker though.
Are you performing adjustments with the wheels on the ground (loaded)? If so, you need to unload the suspension before making adjustments.

KW sells replacement composite spring perches, which should be compatible with the ST (since they are the same manufacturer), they're relatively inexpensive.

 

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Oh cool, I’ll probably buy a new set of perches if I end up breaking too many tabs. I assume with time, the plastic will get more softer or more brittle and become even easier to break.

I am making adjustments with the wheel off and unloaded. I don’t think it’s possible to adjust while the wheels are on, there’s simply not enough room. There is always some kind of load on the front springs as the collar compresses the spring against the top hat.

The drivers side is more prone to damage because it is heavier. I had to adjust it much higher than the passenger side to balance the ride height. 126mm on drivers side vs 118mm on passenger side.
 
Ugh, I broke a few more collar tabs. So decided to try a much easier way to adjust them. You need to remove the sway bar bolt, upper control arm ball joint, and 3 top hat bolts. Basically remove everything except the bottom shock bolt, keep this in place to keep the shock body base from spinning. Next drop the shock down so that the tophat is free to spin along with the coils and piston. Now with very little effort you can spin the collar. Spinning the collar will also spin the tophat and spring so you aren’t fighting against the friction between the two collars sandwiched together. The only downside is you must spin a full circle at a time so that the top hats line up with the FUCA mount. If you wanted to fine tune with a partial rotation, it may be easier to use a spring compressor to take the load off the collar, but it’s probably not that necessary to be that precise. I’m guesstimating one full spin adjusts height by 1-1.5mm. You’ll want to be within a 3mm range of tolerance.