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2014-2018 Mazda 3 Rear Sway Bar

Price: $249.99
Price in points:  What are Points? 250 points
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Remove the tendency to overpower the front tires under hard cornering and minimize traction robbing body lean with the CorkSport Mazda 3 Rear Adjustable Sway Bar. Compressing inside suspension, the CorkSport Mazda3 Rear Sway Bar effectively increases the spring rate on side of the suspension which is compressed most and its adjustability allows you to fine tune the handling. Each Mazda 3 swaybar includes machined 6061-T6 aluminum swaybar brackets which are more durable than the stamped steel design common with other swaybars and look sharp with an anodized black finish.

The CorkSport Advantage

Two endlink attachment pointsAdjustable: Two endlink attachment points to change the swaybar from 130% to 220% stiffer than stock.

Single Piece CorkSport Swaybar

Single Piece: A single piece is used to create the rear swaybar which adds strength by removing weak points such as welds.

Bushings are included with CorkSport's Mazda swaybar brackets.

Billet Swaybar Brackets: Superior bracket design with grease fittings for easy servicing with 90a durometer polyurethane, our brackets and bushings are the last you will need. Once installed, the reduced bar movement gives you extra confidence when taking corners.

The CorkSport Advantage:

  • Extra Value: Includes Billet Swaybar brackets, at $79.99 value.
  • One piece design: CNC bent for precise fit and made from 25mm 4130 Steel.
  • Adjustable: Two adjustable locations for the end links to install allowing you to change how much the bar uses the other side of the suspension. 130%/220% stiffer than stock on the Mazda 3.
  • Made in the USA: Engineered and manufactured by CorkSport in Vancouver, Washington.
  • Durable blue powder coated finish: can survive the winter driving in areas where roads are salted for snow and ice.
  • CorkSport Service and Support: Receive a two year limited warranty, full color installation instructions, all of the needed installation hardware, and knowledgeable telephone support.

  • Install time                  2/5 Difficulty               2 year warranty       No CEL

You definitely do feel the rear end stiffen up while turning. Depending on your ride quality where if you want it stiff or soft, you can adjust that with the end links when installing the rear sway bar. In terms of installing, if you have worked with suspension components before then this is fairly easy. I find it best to use a ratcheting wrench and a pole where you can slip it into the wrench and use it as leverage to break the nuts loose on the brackets - or a pass through socket works just as fine. If you hear clunking then your endlinks are not tight enough, the nuts on the brackets or you didn’t grease the brackets enough. The directions are some what clear but do be careful when pulling out the factory sway bar because there are couple lines that you might tug on while removing the sway bar.
Going to say this out front: This is not the easiest install. I managed without dropping the subframe, but I recommend doing it, as it makes the bolts easier to access.

Other than that, with a bit of clever finagling this can be installed by an amateur with basic tools.

Drive feel is fantastic. I'm running on 9.5 wide wheel set for grip (no tilty) and while the hatch is a decent corner machine, at the limit it was prone to understeer. There was not a huge margin of error between limit and skid, which can be sketchy. The sway bar is a night and day difference. The car is much more prone to oversteer, which can be induced at wheel. Unsettling the chassis can produce understeer, but it is a lot less common and easier to manage. This is a must have mod for racers and corner carvers. Personally I autocross and this made a huge difference in my ability to take the higher speed turns.
Pros: stiffens the car without being uncomfortable, turning is much more responsive, coming out of corners is quite fun now

Cons: installation was difficult, instructions could use improvement

This is the first modification I made to my otherwise stock 2015 Mazda 3 (2.5L). I put it on the stiffest setting on installation.

I have found cornering to be significantly improved over the stock. This is dramatically apparent when you compare the stock sway bar to the CS one. It is nearly twice as heavy and quite a bit more stiff. The front end no longer gets washed out under heavy acceleration from a corner and I feel much more confidence while cornering (especially at greater speeds).

I will say you should consider installing this on your car early. If you have any rust you will be in for a fun time getting the old sway bar out. Having the right tools would definitely have helped as well. I think CS kind of low balls it by ranking it a 2/5. The instructions could also use some additional editing and proofreading, some parts are ambiguous or not easily interpreted (i.e. "Do not loose this part" do they mean "lose" or "loosen"?) and I think some more effort could be put into improving this document.

With that being said, as an amateur mechanic in their driveway I was able to get installation done after a full day underneath the car (and a lot of swearing). I think in hindsight I would have it done by a professional. Right now I plan to get everything re-torqued and make use of the Zerk fitting to ensure longevity and peace of mind.

In closing, I think Corksport offers good value for this product. It sets out to improve one of the biggest flaws in our car and I have been impressed from the quality of life improvement
The sway bar is fantastic. The car feels so much more balanced than it was and you can really get some speed around corners. I've only done the soft setting and I think people who have done the stiff setting may be a little crazy haha I think that would definitely shift the balance to oversteer which I'm not looking to have in a street car. Install was trying but that's more an issue with Mazda's design than anything. Deep sockets were crucial to getting the bolts on the brackets installed. I also had to take the endlinks off completely to get them off the swaybar. I probably did something wrong, but I didn't have enough clearance to just disconnect the endlinks from the sway bar. I may switch the bar to stiff after I get a front sway bar, but although I haven't tried it, I probably wouldn't recommend stiff with nothing else done. Well worth the money in opening up the car's handling, especially if you've gotten summer tires.
This rear end sway bar is not spec'd to OEM size or shape.

If you plan on upgrading any other parts of your suspension setup, like the springs or the end links, this rear end sway bar will cause you some serious headaches.

I don't understand why an aftermarket car company would design and sell a product that requires an OEM suspension setup, but that's what we are being offered.
It's been many months since my install and original review. Now that my stock tires are worn down, I have been throwing the car around quite a bit. Understear has been almost eliminated. There is so little understear, that it could be dicey in the wrong hands. I can cruise thru an empty lot at 35MPH and throw the steering wheel hard over and get the rear to loosen a bit. I suspect new "better than stock" rubber will help. I may need to play with tire pressures too.
Best ever mod for high speed avg 105-115mph twisty roads even on soft setting. Finally got for my setup right with this RSB. Get this if you want to keep up with modded Hondas on twisty roads.
Works very well and a noticeable handling increase can be seen. Well worth it. Highly recommend getting a professional to install as it's a lot of work.
I installed it on the stiffest setting and man oh man it's amazing. I don't rally or anything like that so it was for my daily driver. Helps so much on the freeways and highways, made the car stiffer ride but I don't mind it. I totally recommend it.
Good improvement. Make sure to have a 14mm ratcheting wrench on hand as you will need it quite often. 1 star off for difficulty. Basically impossible to measure torque on some of the nuts.
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