Introducing the CorkSport Lower Tie Bar for the AWD 2019+ Mazda 3 & AWD CX-30! Improve your cornering characteristics and steering feel by stiffening the front subframe of your vehicle.
For example, anytime chassis bracing is added, the stiffened subframe/chassis allows the suspension and tires to do their job better, giving you the performance and feel you want on a twisty backroad. We are proud to bring one of our favorite simple Mazdaspeed 3 mods to the 4th GEN Mazda 3 and CX-30 communities!
Improved Handling
While cornering or under heavy acceleration, all the forces that come from your tires must be counteracted by the suspension and chassis of your vehicle. With lateral cornering loads, a lot of these tire forces are transmitted into your subframe. ( See Image Below) The red arrows show the forces as they act through the control arms and into your subframe.
How It Works
Since the 4th GEN subframe is essentially a large square, these forces can flex the subframe, pushing in the sides and/or turning the square into more of a parallelogram. This flex will dull your handling feel and slow the vehicle’s response to steering inputs. The CS lower tie bar connects the lower control arm mounting points, stiffening the subframe and allowing the CS bar to help counteract any forces that were flexing the subframe previously!
Drivers Report It Handles Better
Okay enough theory, what does this mean for your car? We tested opinions of the car with and without the tie bar, and our drivers reported good improvements! Specifically, better steering feel, reduced bump steer, and more responsive turn-in. The upgrade is perfect for driving on the street, track, or autocross! There is a minor enhancement to the brake pedal feel when under hard braking. Like on the MS3 lower tie bar, the CS GEN4 lower tie bar will even help to control wheel hop and torque steer during those hard launches.
Shape of the Lower Tie Bar
While the shape appears a bit unconventional for chassis bracing, it is for a simple and good reason: so the bar will actually fit! The clearances around the engine, transmission, and transfer case are pretty tight on the GEN4, so the bendy shape had to be used. Rest assured, it fits without issue and installs in just about 30 minutes! This design did present an issue: a bent bar will be less robust than a straight bar. Don’t worry; we used FEA software to simulate a high-load corner and found that our design is more than strong enough to take all of the forces directly without issue. This is a worst-case-scenario as in reality, these cornering forces are distributed among the suspension components, subframe, and rest of the chassis, but we felt it necessary to prove that the CorkSport lower tie bar can handle whatever abuse you can throw at it!
Testing the Tie Bar
Like our Mazdaspeed 3 tie bar, the 2019+ MZ3 bar is made from 1-inch diameter, 0.120-inch wall steel tubing with 0.190-inch thick mounting brackets on the ends. The material and same design philosophy have proven to take every bit of abuse on 600, 700, and 800 horsepower MS3s so you can be confident in its reliability on your GEN4! Each bar is finished off with a satin black powder coat and a small CS decal for a great-looking bar that will stay looking great for a long time.
While not required, the CS Lower Tie Bar works even better when paired with our other chassis braces, like the CS Strut Tower Bar, Sway Bar, and Mazda 3 Rear Hatch Brace. Check out our listing linked below for more info, and be sure to give us a call with any questions!
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