JBR Mazda 3 and Mazdaspeed 3 Coilover Suspension Kits in Stock!!

Details:
Designed with a wide range of adjustabilty, the JBR coilover suspension kit lets you ride to work and carve up the town in maximum style and comfort. Then, when the weekend comes and you're preparing to grid, fine-tune all four corners and transform your Mazda from a mean street machine into a corner hugging track beast. With 32 points of compression and rebound adjustment as well as being fully height adjustable, these coilovers are the only choice when it comes to use on the street and the track.

The JBR front coilovers include camber plates machined from 6061 aluminum and anodized for a sleek look and corrosion protection. They're then fitted with nickel plated steel adjustment plates with pillow ball mounts for smooth, quite operation that will last a lifetime.



The front dampers are of a mono-tube construction with 32 points of compression and rebound adjustment. They carry a 24 month warranty and are fully re-buildable. The entire front assembly is height adjustable from -.5" to -2.95".



In the rear you'll find another mono-tube damper also with 32 points of compression and rebound adjustment. Included with the rear dampers are upper mounts machined from 6061 aluminum, secured to the damper with soft yet very durable rubber bushings. They also carry a 24 month warranty and are fully rebuildable.



The lower mount for the rear dampers are again machined from 6061 aluminum with nickel plated steel sleeves and rubber bushings.



The rear height adjustment is achieved with adjustable spring perches that bolt in to the lower control arm providing a range of adjustment from -.5" to -2.95".



The front and rear springs are made from high quality metal alloy spring steel which undergoes a cold winging process followed by induction hardening and tempering to maintain spring rates, maximize fatigue life and minimize deformation. The front springs are 7.5K and the rear springs are 4.5K




*Applications Available:

• - 2004 - 2009 Mazda 3
• - 2007 - 2009 Mazdaspeed 3
• - 2010 - 2013 Mazda 3
• - 2010 - 2013 Mazdaspeed 3
• - 2014 & Mazda 3

*Product images and options may vary slightly by model.

Features:

• - Completely assembled and ready to install
• - Upper rear shock mounts included
• - 32 point compression and rebound adjustments front & Rear
• - Fully height adjustable from ~-.5" to -2.95"
• - Fully re-buildable

Includes:

• - 2 Adjustable front coilovers with camber plates and 7.5k springs
• - 2 Front adjustment keys
• - 2 Rear 4.5K springs
• - 2 Adjustable rear spring perches
• - 2 Adjustable rear shocks with upper mounts
• - 2 12" rear remote adjustment keys
• - Full 24 month warranty

 

@JBR Why not same spring rate in front and rear to help bring the handling more towards neutral since we inherently understeer with our weight bias? Could this be an option? As it stands, my Swifts are already 4.5k (252 lbs/in), so basically I already have the exact same spring rate in the rear. And are these springs linear or progressive?

Any graphs showing jounce and rebound damping response across the range of adjustability?

Finally, can the fronts AND rear damping be adjusted without removing the components?

 

This car is not balanced 50/50 there's quite a bit more weight on the front suspension. I think what Jamie was is doing here makes the ride more neutral. Plus you can adjust the dampers to your liking. You can even get more granular since it's both compression and rebound adjustable.

 

TL;DR more info, please?

I realize that. We're like 62/38. But Swift, when they developed the springs to for the platform, decided on the same spring rate front and rear. This effectively acts like an upgraded anti-roll bar in the rear without the extra cost. And I can tell you from driving on this setup, that it's an amazing way of addressing the issue. I went ahead and threw on a JBR 125 in the middle setting, which helped even more.

My understanding is that keeping a ratio similar to the stock springs (stiffer in the front, softer in the rear) passes on a great opportunity to address understeer and help the car feel more neutral. Swift was excellent to notice and implement this (they made the springs 252 lb/in front and rear). In effect, a RSB increases the rear spring rate proportionate to rotation about the roll axis of the car. Increasing jounce damping can help, but spring rate will much more directly address the issue. I hope upgraded spring rates are offered for the rear eventually.

KW V3's, known to be some of the best for our platform, use 400 lbs/in front and rear (~7.15k), like Swift. I'm pretty sure about this, based on some research, but perhaps the spring rates aren't the same. Regardless, Mazdaspeed Coilovers, which are essentially KW V3's but with fine-tuned spring rates and damper specs for Speeds are in the middle, running 400 front/291 rear, so they upped the stiffness in the rear relative to the front in comparison to stock, but didn't go all the way up to the same spring rate.

@JBR Can you tell us a little more how you ended up on those spring rate choices, and if they were determined in conjunction with a particular RSB in a particular setting?

Also, I'd love to hear @Nliiitend1's and @phate's take on this, being a guru in the subject matter. Is the main goal to have the same oscillation frequency front and rear?

 

So, it's been almost 3 weeks, @JBR. We know you guys are busy, but other folks like me, who very likely may purchase the coilovers, may like the additional info I asked about, especially when awesome, proven coilovers already exist for our platform. Because of this, knowing your development/option selection process may be the deciding factor for some of us.

 

I sent a message for them to get in here....

 

They look like another set of cheap Chinese coilovers like Sonic. In fact are pretty dead on. Except you pay more and don't get upgraded end links.

(Just an observartion)

In4redlinesrequests

 

I would not call the endlinks that come with the sonic kit a "upgrade"

 

Sorry you are correct i remember the joints popping out on me. let me re-phrase, "except they don't come with a cheap set of "upgraded end links"

How's that lol

 

are you sure about that? from the way i read it, there is one adjustment that does both? not a separate adjustment for each compression and rebound.

 

We chose the spring rates to maintain the similar characteristics of the OEM set up. Adding stiffer spring rates in the rear may act somewhat like a rear sway bar but not everyone wants a rear sway bar and most already have a rear sway bar. Custom valving would be more necessary which in turn would increase the cost and potentially limit the number of applications we can utilize these dampers for.

It's not cost effective to offer these to a limited number of folks considering the state of the platform. Some of the decisions we made were based on appealing to what's left of the masses.

The KW's and the Mazdaspeed coilovers are made more for racing and geared more for those that race. This is why you see more un-common spring rates and individual compression and rebound adjustments. The price point also reflects that.

These are not cheap by any means and they're certainly not Chinese. There are several manufactures involved and many are state-side. All are assembled by us here in the US.

There are a number of good proven coilovers out there and these will become known to be some too. Supporting a company that only makes coilovers to save a $100 bucks does nothing to help advance the current or future platforms. Spending a bit more to support a company like JBR or the very few others that make more than just coilovers for these cars is something that will ensure the aftermarket continues to exist and grow for all Mazda vehicles.

 

can the rear springs be swapped for something slightly stiffer and will the dampeners hold up to stiffer springs? and I only see one dampener adjustment knob?

 

Compression and rebound are adjusted simultaneously. You may be able to swap in stiffer springs, but you may be out of the "sweet spot" in terms of how the shocks are valved. I'll defer to @JBR for more details.

 

If you wanted to go up to a 6 or 7K spring our dampers will be fine. Beyond that, like mentioned, you'll be outside the range of adjustment capability of the damper and ride quality will suffer.

 

We just restocked all components to make more GEN 2 kits.

 

D'oh! If I knew custom spring rates were available, I may have went this route instead. Good to know for others...

 

GEN 1 components are in and we're building sets to ship out tomorrow.