bing tracking image
  1. Vehicle Suspension
  2. SuperSprings Intl
  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Standard Duty
Coil SumoSprings Custom Helper Springs for Coil Spring Suspension - Rear Axle

Coil SumoSprings Custom Helper Springs for Coil Spring Suspension - Rear Axle

Item # CSS-1145R
Our Price: $199.99
Vehicle Suspension

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Shipping Weight: 2 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Get the cushioning power of SumoSprings for your coil springs and keep your ride comfortable. The wedge-shaped springs fit between the individual coils of your existing springs and help support heavy loads on your rear suspension. Great Prices for the best vehicle suspension from SuperSprings Intl. Coil SumoSprings Custom Helper Springs for Coil Spring Suspension - Rear Axle part number CSS-1145R can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (394)
  • Q & A (0)
  • Photos

SuperSprings Intl Vehicle Suspension - CSS-1145R

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Standard Duty
  • SuperSprings Intl

Get the cushioning power of SumoSprings for your coil springs and keep your ride comfortable. The wedge-shaped springs fit between the individual coils of your existing springs and help support heavy loads on your rear suspension.


  • Helper spring inserts increase ride comfort and enhance your coil suspension's ability to support loads
    • Inner core of microcellular polyurethane foam provides cushioning and support
  • Adjusts progressively to the weight of your load - the more you load onto your vehicle, the stiffer they become
  • Reduces body roll and helps level your truck
  • Withstands extreme temperatures
  • Durable springs resist damage caused by abrasion, oil, road salt and UV rays
  • Installs easily on rear coils
    • Inserts between the individual coils of each coil spring
    • Custom fit for your vehicle
  • Requires no maintenance
  • Includes 2 helper springs
  • Made in the USA


  • Application: rear coil spring suspensions
  • Designed to work with a suspension system that is in good working order
  • Coil SumoSprings will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's weight limit for your vehicle.
  • Limited Lifetime warranty
  • 30-Day satisfaction guarantee

Insert these helper springs in between the individual coil loops in your rear coil springs to defeat driver fatigue and add better support for heavy loads. Most factory coil suspensions have a difficult time hauling added weight. The rear coils may struggle with supporting the extra load placed on your rear axle when you're towing a trailer or using a hitch-mounted cargo carrier or bike rack. If your coil springs are totally squished under a load, the lack of shock absorption can be harsh on your backside, especially if you spend long hours sitting in your vehicle while driving to your campsite.

Coil SumoSpring installed between rungs of coil spring

Inside each helper spring, a core of microcellular polyurethane foam adds cushioning between your coils to make your ride more comfortable. Each doughnut-shaped spring has H-shaped channels at the top and bottom that fit to the rung of an individual coil in your rear coil springs. The cushioning absorbs shock, but also works progressively to better support weight, keeping your truck level.

Unlike air springs that fit inside your coil springs, these polyurethane springs require no air pressure monitoring, and they are easier to install. Say goodbye to air lines, valves and air tanks and hello to maintenance-free suspension support. Unbumpify your ride with Coil SumoSprings for coil suspensions.

CSS-1145 SuperSprings Coil SumoSprings Helper Springs for Coil Spring Suspension - Rear Axle

Installation Details CSS-1145R Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Coil SumoSprings Custom Helper Springs for Coil Spring Suspension - Rear Axle - CSS-1145R

Average Customer Rating:  4.6 out of 5 stars   (394 Customer Reviews)

Get the cushioning power of SumoSprings for your coil springs and keep your ride comfortable. The wedge-shaped springs fit between the individual coils of your existing springs and help support heavy loads on your rear suspension.

2021 Chrysler Pacifica

Took a chance and ordered rears for my 2021 AWD Pacifica even though the AWD model wasn't listed. After cutting a couple of inches off they fit perfectly! Coils are tight so you'll need to unbolt the bottom shock bolt to gain an extra inch of decompression. Once installed there's no difference in ride hight or ride with the van unloaded. Once loaded up it gives the extra support needed to prevent scraping my muffler pulling in and out of driveways. I know this mod voids the warranty, but it was a chance worth taking.

2005 Toyota Prius

Everything works great! I love products.
Here's a shot of the Sumo Springs installed on my 2005 Prius:

Justin G.


They are great! Big difference from stock.

Dodge Ram Pickup

Installed the SumoSprings Custom Helper Springs for suspension - Rear Axle on my Ram 1500. Easy install, if you follow their enclosed directions. It took longer to jack up the truck and secure it than the actual installation. Any negative comments that were written about the installation are most likely based on the ability NOT to read and follow the written directions. Took a drive after installation and immediately felt the difference in handling. Actually installed them to assist in the 30-foot travel trailer I am towing with a 1500 Ram. No doubt it is going to assist with the sway bars already on the trailer. In my opinion, it was a good investment for the price vs the results.

Toyota Highlander

When fully loaded our Highlander had a severe sag, but after I installed the Sumo Springs, the suspension is improved when loaded and even better feel with daily driving.

2014 Chevrolet Equinox

Not the easiest to install but effective. I don't haul heavy loads often so I install them only when needed. I wish there was an air bag set-up for this vehicle.

Robert H.


Still working well, no issues.


I installed the Sumo Springs in my 2016 Toyota Highlanderthey fit well. Total install took approximately 10 minutes.

2018 Toyota Highlander

Easy to install- would recommend taking tires off as it eases installation.
Immediate ++ results on towing and load carry capacity. No more droopy bootie!!


Right now the only thing I can comment on regarding the springs is on how easy they went on. Followed the instructions to a T. No problem. Have not had the opportunity to test them on towing.

2015 Toyota Highlander

I was very pleased with the Sumo Springs for my 2015 Toyota Highlander Limited rear springs. Was a little worried if they would fit and if I could install them myself. Turned out to be fairly easy after watching a few YouTube videos. It's important to get the springs fully released by getting the tires off the ground an inch or so. Be sure to use safety jacks so you don't lose a hand or fingers. I had to jack up each side separately. Follow the directions by cleaning and spraying the car springs and spray Sumo springs too with soapy water. Was a little tough getting them started, but once in place would spin easily to get into position between the 2nd and 3rd spring and also to rotate to install all the zip ties. I loaded my hitch with 300# on a cargo carrier. Without the sumo springs dropped 1 1/2". With Sumo springs only 1/2". The 300# simulated the tongue weight of a camping trailer I am renting next week. 1" difference may not seem like a lot, but I was pretty pleased that such a easy, low cost fix that will allow me to tow up to the 5000# capacity rating of my SUV. I didn't notice any difference in handling when driving without any weight. My cargo carrier also has a 500# capacity so I'm good for traveling towing a camper or with my cargo carrier. As always, eTrailer was great about fast shipping. Ordered on Tuesday and arrived on Wednesday. eTrailer is my go to place for anything auto related.



Its still working great. Glad I installed the Sumo springs.

2018 Toyota Highlander

Lifted the rear of our 2018 Toyota Highlander 1", and was easy to install. Though, we haven't had the opportunity to test them.

2015 Toyota Highlander

The Sumo coil springs helpers did help with the rear spring sag and subsequent unweighting of the front end when my 2015 Toyota Highlander is hooked to our 20 ft 3,000 lb Winnebago Micro Minnie trailer. The steering felt better after installing the Sumos, but I had hoped for a bit more support from them, however the situation is definitely better with them than without them.

Eldon A.


Satisfactory, it helps mitigate rear end squat


Timely shipping, and correct product. Only issue was that kit didn't have the tie straps included so my installer provided them.

2014 Toyota Highlander

I have a set for my rear suspension on my 2014 Highlander. These were easy to install and I noticed an immediate difference with firmer rear suspension. Where these really stood out was towing my boat. These substantially reduced rear suspension sag and body roll around corners. I will likely get a set for my front suspension too. If ordering again, I would get front and rear at the same time. This is because I notice a difference in the firmness of rear vs front. This has been a good solution for towing on 3000lb boat on my highlander.

2013 Toyota Highlander

Installation on a 2013 Toyota Highlander was very easy.

2015 Toyota Highlander

2015 Highlander XLE AWD. It works for what I intended. The hitch raised 1 1/2" under load. The load was around 1000lbs in the vehicle and a 250lb cargo basket on the hitch. If you count the hitch and misc items in the vehicle, the load would was 1350lbs out of the 1445lb payload. Without the sumosprings, it easily bottomed out. It does not level like an air bag system, however it improves the ride dramatically under load and does not bottom out. Most of the negative reviews I read were people expecting their highlander to tow a travel trailer. Not a vehicle I would choose for the job. Even light travel trailers have high tongue weights. Add people, a weight distributing hitch, equiptment and your payload is gone. The ride does not change unloaded. Until a better product is available, I'll be sticking with this one. Installation was very simple.

2009 Mercury Grand Marquis

Installation went smoothly once I unhooked the shock absorber and allowed the spring to decompress. It looks like it lifted the back end about an inch with a couple hundred pounds of stuff in the trunk.

2013 Toyota Highlander

Made absolutely no difference. Car is sagging just as much as before. Waste of money

Etrailer Expert

Jenny N.


Having that rear vehicle sag is definitely not ideal. Sometimes the springs are not enough and a weight distribution system is needed as well. I am linking a FAQ below that would assist in seeing which WD system would be the best for you.


I had doubts initially but they seem to be working.

2019 Toyota Highlander

Works as described.

2020 Honda Ridgeline

Delivered on schedule.
Went on easily.
Done in 1hr.
Looking forward to less sag.


It helped a little. Easy to install, didn’t even have to take the wheels off. Really no other option for a Highlander that I know of to add capacity to basically a car rear suspension.




2016 Toyota Highlander

Works great for what I needed. I had issues with the rear of the 2016 Highlander bottoming out when loaded (5 people, luggage and a hitch bike rack). After installing this, the ride has improved. I had 5 people, full interior cargo area, 21 cubic foot cargo box on top and a hitch cargo carrier. While I did get some sag in the rear, I did not have the harsh bottom outs that I was getting with a much less loaded vehicle before.

2017 Hyundai Santa Fe

They work GREAT on my Hyundai Santa Fe Limited. They help with the rear end sag when towing my trailer.

2011 Volkswagen Golf

Excellent product for what I needed. This was installed on a 2011 VW Golf TDI. I had installed air bags on the car 2 years ago and was not pleased with the ride and maintenance (air adjustments) needed to keep the system up. I was tired of dragging the trailer hitch and mud flaps even with the air bags. The golf rear springs are to soft and allow the rear of the car to sit to low even unloaded. I removed the air bags and easily installed the sumo helper springs CSS-1145R. I installed one side at a time, so I needed to disconnect the sway bar and shock to allow the rear wheel to drop enough to install the product easily. The result is approximately 1 inch increase in rear ride height and a slightly stiffer ride.

2008 Ford Escape

Super easy installation onto the rear coils of my 2008 Ford Escape. Definitely use a soap solution to help slide the device onto the coils. No noticeable different to the ride when unloaded, but prevents sag when carrying my dirt bike (250 lbs) on a hitch-mounted carrier.

Show More Reviews

See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Comparison Between SuperSprings # CSS-1145 And # CSS-1145R
    Part # CSS-1145 and part # CSS-1145R are identical helper springs. They are designed to fit the rear only for your 2013 Dodge Durango. Originally these were designed for both the front and back and the R indicated they were to be used on the rear only. These are inserted between the coils of each coil spring on your Durango and help to reduce body roll and help keep your Durango level. As more weight is added the stiffer they become.
    view full answer...
  • Rear Suspension Enhancement Kit for 2020 Toyota Highlander
    We have suspension support kits that fit your 2020 Toyota Highlander with the Coil SumoSprings kit part # CSS-1145R. This will do a great job giving the rear suspension more support to get rid of the sag.
    view full answer...
  • What is The Difference In the SuperSprings Coil SumoSprings # CSS-1145 & # CSS-1145R?
    The Coil SumoSprings Custom Helper Springs # CSS-1145 and # CSS-1145R are exactly the same. We also have the # CSS-1145F which is the same. We created the Rear # CSS-1145R and Front # CSS-1145F specific products to eliminate confusion when looking up the products by vehicle application.
    view full answer...
  • Can Weight Distribution and Suspension Enhancement be Used with 2008 Toyota Highlander
    Suspension enhancement can be used with your weight distribution and will help with rear end sag. So the # CSS-1145R that fits your 2008 Toyota Highlander would help. You'll need to set your weight distribution up again.
    view full answer...
    Image 1 for
  • Using # CSR-1145R Coil Sumo Springs to Raise Ride Height of 2005 Honda Odyssey
    Suspension enhancement products like the # CSS-1145R Coil Sumo Springs will not raise the ride height of a vehicle, they will only provide extra support for any cargo you might be carrying. The # CSS-1145R springs are meant for the rear suspension only. If you were wanting to increase your ride height, a shop that does custom suspension work should be able to help you, but we don't offer anything that would raise the ride height of your Odyssey.
    view full answer...
  • Ability of Coil Sumo Springs # CSS-1145R to Raise Ride Height of 2012 Jeep Grand Cherokee
    The Coil SumoSprings you mentioned, part # CSS-1145R will not change the ride height of your Grand Cherokee. They are meant to smooth the ride and help eliminate some sag caused by carrying heavy loads in the cargo area. In other words, the SumoSprings will not lift the vehicle, but will help resist against sag when the vehicle is under load. Various aftermarket lift kits are available in different heights. I would recommend doing a Google search on a lift kit for 2012 Grand Cherokee.
    view full answer...
  • Preventing Rear End Sag on a 2007 Toyota Prius
    I know from experience that Toyota states not to tow with a Prius but you may want to check the owners manual to determine if carrying a bike rack is acceptable. Any trailer hitch for a Prius is going to be a Class I with 200 pounds tongue weight capacity. Also on a Class I you are limited to carrying a maximum of 2 bikes. Any more than that puts the bikes too far from the receiver which produces too much stress on the hitch, like using a cheater bar to loosen a lug nut. But to help with...
    view full answer...
  • Will the Coil SumoSprings Custom Helper Springs CSS-1145R Fit a 2012 Toyota Highlander Hybrid
    I spoke with Super Springs about the Coil SumoSprings Custom Helper Springs part # CSS-1145R for your 2012 Toyota Highlander Hybrid. The issue is not that it is not a fit but rather they have not yet had a Hybrid model in to test them on. If you are sure they are the same suspension then they will work for you but in order to be certain I would need you to take the measurements I have attached for you so I can confirm compatibility.
    view full answer...
    Image 1 for
  • Will SuperSprings Custom Helper Springs Help Rear Sag on 2012 Toyota Highlander with Tent Trailer
    The SuperSprings Coil SumoSprings Custom Helper Springs # CSS-1145R referenced in your question is confirmed to fit your 4WD 2012 Toyota Highlander. These springs will simply insert between the individual coils of each coil spring to enhance the suspension's ability to support loads like your trailer. This will definitely do a nice job of preventing the rear sag you are experiencing when hooking up your tent trailer. I have attached a short video demonstration on this product, along with...
    view full answer...
  • Should a Vehicle with Weight Distribution System Need Suspension Enhancement
    If your weight distribution system is properly rated and set up on your vehicle you should not need suspension enhancement, especially not a second set of it to provide additional support. I would verify that you have the correct rated WD system for your loaded tongue weight which counts the weight of any cargo behind the rear axle as well as make sure your system being set up properly. Your sag problem will lie with one of those two thing mentioned. I also attached a help article on...
    view full answer...
  • Suspension Enhancement Availability for a 2012 Toyota Highlander Using Weight Distribution
    A properly setup weight distribution system should all but totally eliminate the rear end sag of a vehicle when towing. I would first make sure you have a setup that is properly rated for the tongue weight of your trailer and that it is also properly setup. With those two things check out you should see the trailer setting as level as possible. If you still need some suspension support the part # CSS-1145R has been confirmed as a fit for your vehicle and would help prevent rear end sag. I...
    view full answer...
  • Suspension Enhancement for a 2007 Toyota Prius
    The only suspension enhancement product we have available for your 2007 Toyota Prius is the SuperSprings Sumo Springs, # CSS-1145R. These are going to work well to keep the rear of the vehicle level. Once you have them installed you will not have to mess with them again. With air bags you would have to fill and remove air, find a compressor if you do not have one, run air lines. The SumoSprings are a much easier option.
    view full answer...
  • Do Coil SumoSprings have an Effect on the Axle Alignment or Wheel Camper on a 2012 Toyota Highlander
    Installing Coil SumoSprings # CSS-1145R on your 2012 Toyota Highlander will not affect the rear axle alignment or the wheel camber. However, to install the springs you have to jack up the frame of the vehicle until the suspension is fully extended. While it isn't likely that doing so will have an impact on the alignment or camber that is the only part of the installation that could change the alignment. Wheel camber is basically a non-issue. I have linked the instructions for you and...
    view full answer...
  • Correct Coil SumoSprings Custom Helper Springs for Coil Spring Suspension for a 2010 Toyota Highland
    Correct, the Coil SumoSprings Custom Helper Springs for Coil Spring Suspension part # CSS-1168R is for FWD models and the part # CSS-1145R is for AWD models of a 2010 Toyota Highlander. These are designed to be installed in the rear. They are incompatible with Hybrid models.
    view full answer...
  • Which SumoSprings Kit Fits the 2013 Hyundai Santa Fe GLS
    The difference between the two Super Springs part numbers you referenced is the version of the 2013 Hyundai Santa Fe they are designed to fit. Since you have a GLS you would want the part # CSS-1125R. The part # CSS-1145R is designed for the Sport models and would not be a fit for the GLS.
    view full answer...
  • Difference Between CSS-1145R and CSS-1145R For Toyota Highlander
    The difference between the Coil SumoSprings Custom Helper Springs for Coil Spring Suspension part # CSS-1145R and part # CSS-1168R is that the CSS-1145R is designed for 4 wheel drive models and the CSS-1168R kit is designed for 2 wheel drive models. Neither one of the springs fit the hybrid model Highlander. If you want to provide me with the year of your Highlander I can look into the options for you.
    view full answer...
  • Comparing Super Springs Coil Helper Spring Kits CSS-1145R & CCS-1168R for 2008 Toyota Highlander
    The difference between Super Springs rear-axle coil spring suspension kits # CSS-1145R and # CSS-1168R is the vehicle version each one fits. Kit # CSS-1145R fits Highlanders with All Wheel Drive while kit # CSS-1168R fits Front Wheel Drive models. These coil spring kits offer the easiest method to add suspension enhancement to a vehicle since their installation is simple and they require no maintenance at all. Please refer to the linked video which details the tool-free installation process.
    view full answer...
  • Which SumoSpring Suspension Enhancement Kits Fit 2012 Toyota Highlander AWD
    Since your 2012 Toyota Highlander Limited is AWD the correct SumoSprings kit is the part # CSS-1145R that you mentioned. The part # CSS-1168R is for the 2 wheel drive models. It's listed like this on our site but I could see how it would easily be confused.
    view full answer...
  • Rear Suspension Enhancement for a 1999 Ford Expedition
    The coil SumoSprings # CSS-1145R are the ones that will fit your 1999 Ford Expedition. These springs will work with 4WD and 2WD. The springs # CSS-1168R you referenced are not a fit for your 1999 Ford Expedition.
    view full answer...
  • Difference Between Coil SumoSprings for 2014 VW Golf
    There is just a slight difference in size between the two parts; the Coil SumoSprings # CSS-1125R have a 1.25" inner wall height and are 2.5" tall and 6" in diameter. The Coil SumoSprings # CSS-1145R have a 1.45" inner wall and are 3" tall and 6.5" in diameter. Each of these springs are a fit for your 2014 VW Golf and though neither is stiffer than the other, they work by becoming stiffer depending on the load. Both products install the same on your Golf's coil springs and will give you...
    view full answer...
  • Which SumoSprings Coil Spring Kit Fits 2018 Hyundai Santa Fe XL
    The SumoSprings Coil Springs kit part # CSS-1145R is a fit for your 2018 Hyundai Santa Fe XL. There aren't any air bag options that fit your vehicle either. This is the only option.
    view full answer...
  • Coil SumoSpring Custom Helper Spring Fit for 2021 and 2022 Honda Odyssey
    According to SuperSprings, the # CSS-1145R won't work with a 2021 or 2022 Honda Odyssey, but the good news is that they DO have an application that WILL work. You'll want to use part # CSS-1125 which is a fit for that year range Honda Odyssey. If you click the provided link, you can see a video showing a typical installation.
    view full answer...
  • Will Coil SumoSprings Custom Helper Springs Fit a 2018 Toyota Highlander
    I'm pretty sure you are correct that the Coil SumoSprings Custom Helper Springs # CSS-1145R will fit your 2018 Toyota Highlander, however, we haven't had the chance to test this out and SuperSprings doesn't have this listed in their fitguide so I cannot guarantee fitment. The best thing to do is get some measurements of your springs so that I can confirm the correct fitment with SuperSprings on my end. I am attaching a photo showing what measurements I will need so that I can verify what...
    view full answer...
    Image 1 for
  • Is it Safe to Use the SuperSprings Coil SumoSprings to Tow a Trailer with a 2010 Honda Odyssey
    Yes, you can use the Coil SumoSprings, # CSS-1145R, on your 2010 Honda Odyssey to safely reduce sag when towing a trailer. A weight distribution system would be the best option, but suspensions enhancement like the SumoSprings will work also. Weight distribution is recommended over suspension enhancement because it takes weight off of the rear axle of your Odyssey and distributes that weight among all of the axles. With suspension enhancement, the additional weight will still be on the...
    view full answer...

< Previous

Do you have a question about this Vehicle Suspension?

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Zack K
Video Edited:
Zack K
Employee Jacob T
Video Edited:
Jacob T
Employee Jeff D
Installed by:
Jeff D
Employee Tricia G
Written by:
Tricia G
Employee Joshua S
Video by:
Joshua S
Employee Chris R
Video by:
Chris R
Employee Jonathan Y
Video by:
Jonathan Y
Employee Adele M
Updated by:
Adele M
Employee Rachael H
Updated by:
Rachael H
Employee Mary K
Updated by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Jenny M
Updated by:
Jenny M
Employee Alex H
Updated by:
Alex H
Employee Noah M
Updated by:
Noah M
Employee David F
Test Fit:
David F

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.