[Kennykid2002]

Lo folks.
Was doing my research on which RSB (Rear sway bar) I wanted and came across that Progress now sells a RSB for our Gen3 Mazda 3.
Now I'm a big fan of Progress since I had them on my civic, so I wanted to compare them to what else was on the market.
Took the liberty of emailing some of the manufacturers for additional specs and information.
Didn't end up with all the information as I'd hoped, but thought I'd share a comparison for those interested in looking for a sway bar.
If anyone finds any additional specs, or manufacturers making RSB's for our 3, please let me know to update this.

TL; DR Here are some specs for rear sway bar comparisons.
Just in case anyone was curious.

OEM Rear Sway

Size: 18mm Solid Bar
334lb/in (Measured by Progress)
345lb/in (Measured by Corksport)

Progress RSB - $165.75
Includes - TIG-welded reinforced Metal Brackets, Polyurethane Bushings, Synthetic Bushing Grease

Size: 22mm Solid bar
Material: ? 
Settings: 2
Tortion (Soft): 772 lb/in. (231% Compared to stock, 131% Stiffer than stock)
Tortion (Firm): 1015 lb/in. (303% Compared to stock, 203% Stiffer than stock)
Manufacturing: Made in USA
Warranty: 1 Year, Original Owner, Non-Transferrable

Racing Beat RSB - $185
Includes - Metal Brackets, Polyurethane Bushings, Bushing Grease

Size: 0.9375" (24mm) Solid bar
Material: ?
Settings: 1
Tortion: 976 lb/in.* (287% Compared stock, 187% Stiffer than stock)
Manufacturing: Made in USA
Warranty: 1 Year, Original Owner, Non-Transferrable

James Barone Racing RSB - $205.00
Includes - Metal Brackets, Polyurethane Bushings, Bushing Grease

Size: 1.25" (32mm) Tubular design, with .120" wall thickness
Material: 4130 chromolly steel 
Settings: 2
Tortion (Soft): 867 lb/in.* (255% Compared to stock, 155% Stiffer than stock)
Tortion (Firm): 1241 lb/in.* (365% Compared to stock, 265% Stiffer than stock)
Manufacturing: Made in USA
Warranty: Lifetime, Original Owner, Non-Transferrable

CorkSport RSB - $219.99
Includes - 6061-T6 Aluminum Brackets, 90a Durometer Polyurethane Bushings, Bushing Grease

Size: 25mm Solid Bar
Material: 4130 Steel
Settings: 2
Tortion (Soft): 794 lb/in.** (230% Compared to stock, 130% Stiffer than stock)
Tortion (Firm): 1104 lb/in.** (320% Compared to stock, 220% Stiffer than stock)
Manufacturing: Made in USA
Warranty: 2 Years

AutoExe RSB (MBM7650) - $152~210 USD (JDM Product ONLY)
Includes - REAR BAR ONLY, uses OEM mounts and bushings

Size: 18mm Solid Bar
Material: ?
Settings: 1
Tortion : 748 lb/in.* (220% Compared to stock, 120% Stiffer than stock)
Manufacturing: Made in Japan
Warranty: ?

* = Number derived by averaging OEM torsion rates measured by Progress, and Corksport to 340, and adding the tortion by the spec of stiffer % measured by each company
** = Number derived by CorkSport's OEM measured stiffness spec on top of stock.

 

[XCNuse]

vote for sticky (these are good numbers and fantastic research that needs to be visible)

Typically yes you'd rate over stock, so the corksport would be 100 + X%
Annoying? Absolutely.
Progress was a huge name for the early gen1 owners, good to see they're still offering.

 

[mazdaspeedmyk]

Made a sticky.

Thanks for compiling this into one place for the gen3s.

 

[Moto-x_Mike]

Don't know where you got your numbers, but here's a quote from Corksport's website:

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

Your initial soft tortion measurement is less than stock. Looks like a math error & bad info to me. I think Corksport's numbers should be: Soft: 449, Firm: 759

 

[Kennykid2002]

Don't know where you got your numbers, but here's a quote from Corksport's website:

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

Your initial soft tortion measurement is less than stock. Looks like a math error & bad info to me. I think Corksport's numbers should be: Soft: 449, Firm: 759

You are correct in this aspect.
I went back and looked.

There seems to be a confusion between "Mazda 3 RSB" and "2014+ Mazda 3 RSB" on Corksport's website.
Found here
Rear Sway Bar | Mazda 3 Sway Bar
Which actually says
"Adjustable: Two endlink attachment points to change the stiffness between 94% and 175% stiffer than stock. "
and here
CORKSPORT 2014+ Mazda 3 Rear Adjustable Sway Bar
Since they are both similar, and priced exactly the same.

I must have pulled up the wrong one as I was doing this, and I'll admit to that.
However, going by those numbers, they still fall short of Progress's 22mm bar compared to their 25mm.
Unless they are saying +130% and +220% stiffness.
But the wording says "130% stiffer than stock" and going by that, that would be 345 lb/in * 1.3 = 448.5 lb/in

I've gone and updated the first post with the corrected numbers for Corksport.

 

[$lickology]

This is a great thread !!! I appreciate the op's effort in compiling this info.

 

[actuator]

Great information. I have a suggestion, I would like you to add some information about which bars come or have brackets available (ie, corksports comes with brackets and JBR has them available). I think that would good information to include.

 

[Kennykid2002]

Great information. I have a suggestion, I would like you to add some information about which bars come or have brackets available (ie, corksports comes with brackets and JBR has them available). I think that would good information to include.

Added.

 

[Mikef5000]

Just a tip... I did some searching on that Progress RSB, and found it on sale here: Progress Technology 62.1127 Anti-Roll Bars - 14-14 Mazda3 « Free Shipping

$168.96 with free shipping for a limited time. I emailed them, and they said it has about a 2 week lead time right now, as it's still in production.

 

[gsk3rd]

I can confirm the CS bar comes with grease. You have ??????? after it in your list.

 

[Kennykid2002]

Just a tip... I did some searching on that Progress RSB, and found it on sale here: Progress Technology 62.1127 Anti-Roll Bars - 14-14 Mazda3 « Free Shipping

$168.96 with free shipping for a limited time. I emailed them, and they said it has about a 2 week lead time right now, as it's still in production.

That's not too bad, considering I've now waited 5 weeks for my exhaust.... >.>
I'll probably definitely get the Progress when the time comes.

I can confirm the CS bar comes with grease. You have ??????? after it in your list.

Appreciate noticing the detail.
Yeah, the CS didn't mention anywhere that they come with grease. I assumed they do, would be idiotic not to. Updated the list. Thank you

 

[Toast4asians]

Has anyone else seen this on eBay before?

http://m.ebay.com/itm/Ultra-Racing-19mm-Rear-Sway-Bar-for-Mazda-3-BM-14-15-UR-AR19-463-/141524882701

 

[Kennykid2002]

Has anyone else seen this on eBay before?

Ultra Racing 19mm Rear Sway Bar for Mazda 3 BM '14 '15 UR AR19 463 | eBay

I came across their stuff when researching.
When I was making the list, their website showed BM chassis, but for 2013 only.
Here is the link for their products.
Mazda 3 BM (2WD) 2.0 (2013) Aftermarket Performance Parts / Accessories / Spare Part - Ultra Racing Product Catalog

The brackets look shoddy, and I honestly couldn't see myself pay that much for a 1mm difference to OEM.

It would definitely not be something on my radar.

 

[XCNuse]

UR makes a loooot of easy weld and bend parts for just about every car.
They aren't high quality, but they do produce quantity.

For a product that already exists with a better name? I'd go with the better name.

For a product only they seem to supply? Why not (depending what it is). They mostly just make braces from what I've seen, that may not be great but "get the job done" for people interested.

But I'll still stand by the 'if a better name makes it, go for the better name'

 

[Toast4asians]

I'm from Australia so the only option I have is to wait till Whiteline make a swaybar for the Gen3, I could buy from Corksport but I'm not keen on paying almost the same amount for shipping and exchange rates

 

[KennyT]

Maybe you should unclude the shipping rates, like next to the price, for each of these RSB's. For instance, the JBR and Progress bars can be had with free shipping, whereas I just went to order the CorkSport RSB and their site only had two option: customer pickup, and shipping via USPS for: $100.30 !! Dealbreaker for me. I'm going to contact them and see if there are any other options, otherwise I think I'll just get the Progress Technogy RSB for $168.96 with free shipping!

 

[Kennykid2002]

Maybe you should unclude the shipping rates, like next to the price, for each of these RSB's. For instance, the JBR and Progress bars can be had with free shipping, whereas I just went to order the CorkSport RSB and their site only had two option: customer pickup, and shipping via USPS for: $100.30 !! Dealbreaker for me. I'm going to contact them and see if there are any other options, otherwise I think I'll just get the Progress Technogy RSB for $168.96 with free shipping!

Prices and shipping vary by venders
It just makes it easier to have MSRP cost.
That way you can shop on your own based on the original price

I think CorkSport RSB shipping was like $30 for me.

 

[KennyT]

Prices and shipping vary by venders
It just makes it easier to have MSRP cost.
That way you can shop on your own based on the original price

I think CorkSport RSB shipping was like $30 for me.

Understood. BTW, I did end up getting mine shipped for < $30.00 ... somehow the wrong state was selected for me either their website had an issue or it was me. probably me. My apologies to CorkSport!

 

[Kennykid2002]

Understood. BTW, I did end up getting mine shipped for < $30.00 ... somehow the wrong state was selected for me either their website had an issue or it was me. probably me. My apologies to CorkSport!

Yeah, I just checked. Its like $21 shipped to me.
Just curious, after seeing the price and specs, why still choose the CorkSport over the progress?
Not that there's anything wrong with that choice, they're both great brands, but just wondering your reasoning behind your choice.

 

[parkinskin]

Based on my understanding, Progress measures its numbers differently than JB and CS.

Progress has measured its stiffness as X% as stiff as stock.
JB and CS has measured their stiffness as X% stiffer than stock.

So for Progress, 231% as stiff as stock actually means 131% stiffer than stock and 303% as stiff as stock actually means 203% stiffer than stock.

For James Barone, 155% stiffer than stock actually means 255% as stiff as stock and for Corksport, 130% stiffer than stock actually means 230% as stiff as stock.

Therefore for both JB and CS, respectively, JB is stock multiplied by 2.55 and 3.65, and CS is stock multiplied by 2.3 and 3.2.

Progress's numbers are good, and I can't speak to Racing beat because it's not listed on its website.

But for JB, my understanding is that the numbers should be:

867 lb./in. for less stiff
1241 lb./in. for more stiff

And CS should be:

794 lb./in. for less stiff
1104 lb./in. for more stiff

These numbers make sense to me based on Progress's listing of:

772 lb./in.
1015 lb./in.

The numbers do not vary as wildly among the different brands now.