Author: CorkSport

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New Rear Motor Mount Insert for 2019+ Mazda 3 and CX-30 Owners

For those looking for a Rear Motor Mount upgrade for your 4th GEN Mazda 3 or CX-30 but don’t want to add too much additional NVH, we are excited to release the CS RMM Inserts. The CS Inserts utilize the OEM mount and offer performance quality between the stock and CS Rear Motor Mount. This means you will get less NVH from the upgrade when compared to the CS RMM, which will be great when driving around town. While not being as aggressive as the full replacement CS RMM, you will see a nice improvement in feedback and responsiveness when pushing it on the back roads or in other situations in which you are utilizing the full potential of your Mazda. If you are interested in this new option, keep on reading for more specifics on how the CS RMM Inserts were designed. 

NOTE: NVH (noise, vibration, harshness) is a standard term used in the automotive industry.  NVH is a byproduct of changing some OEM components to aftermarket components in the pursuit of focused performance. Examples of components that can increase NVH: are engine mounts, clutch/flywheel, intake, exhaust, suspension, tires/wheels…and many more. 

Rear Motor Mount Insert for 2019+ Rear Motor Mount OEM

During the design process, we started with the Mazda 3 OEM rear motor mount and worked on modeling inserts that would completely fill the two openings. Once the initial designs of the two inserts were completed we began testing the samples and started with both front and rear inserts installed at the same time. Our initial impressions were quite surprising. We found that this combo resulted in the same if not more NVH than when the full CS Rear Motor Mount was installed.

Diagram of Rear Motor mount insert for the Mazda 3/CX-30

Since the dual combo didn’t get us to where we wanted, we then tried each insert one at a time. This helped quite a bit and reduced NVH down closer to where we wanted. The issue we encountered when using only one insert was that the gear with worse NVH varied depending on whether we were in drive or reverse. This led us to trim and remove sections of the front and rear inserts to try and get the best of both worlds. By removing the center of the inserts, we were able to find a design that operated in line with our target performance levels. It ended up being a good middle ground between the stock and CS RMM. A comparison of the performance can be seen in the video below showing all three options.       

Now onto some other specs of the CS Inserts. The durometer of the polyurethane we selected for the front and rear inserts is 70A. This gives the inserts enough flex to be installed into the mount without too much effort. This all allows for a tight fit so they do not work their way out during operation. Locking tabs were integrated into the inserts to ensure they remained installed in their correct position.     

Diagram of Rear Motor mount insert for the Mazda 3/CX-30

That covers the basics of the new CorkSport Rear Motor Mount Inserts for the 2019+ Mazda 3 and 2020+ CX-30. Head over to the website to learn more about the RMM and see additional pictures if you haven’t already!

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The Wait is Over for the 2021+ Mazda Turbo Downpipe

Fits Models Mazda 3, CX-30, CX-50

Unleash the potential and growl from your car and take the step forward into more power! A full 80mm Turbo Back exhaust is now possible with CorkSport’s new Catted Turbo Downpipe for the 2021+ 4th Gen Mazda3 Turbo (as well as CX30 & CX50 Turbo Models)!

Best Mazda Catted Downpipe Kit from CorkSport

Our downpipe uses a two-piece design, making installation easy without the need to wrestle with a single large, cumbersome pipe. The Downpipe starts with a high-flowing cast 304 Stainless Steel Bellmouth, then joins the 80mm mandrel-bent piping with a V-band connection for a leak-free seal.

We used 3D scan data from the OEM downpipe when designing our CS pipe, which means fitment is just like OEM and the CorkSport Downpipe will fit with any aftermarket Cat-back exhaust system, or even OEM!

Best Mazda 80mm Downpipe

A high-flow 300 cell Catalytic Convertor is utilized in our downpipe and has been tested to have no significant effect on power potential.  A catless option is not available. 

80mm Downpipe installed on the Mazda 3

Do I Need A Tune?

Addressing the other elephant in the room: Tuning. We highly recommend getting a tune after installing the 80mm downpipe as there are very strict airflow limits in the stock tune that severely limit power. This will result in some mild stutters, surging, or “hiccups” at wide-open throttle. This does not do any damage as it is simply a very conservative safety limit for stock components.

With more flow-efficient parts (i.e upgraded intakes , Turbo Inlet Pipe, and exhaust systems), these limits are being reached much easier and the ECU will limit the power output of the engine. The vehicle will be drivable on the stock tune and still give you an aggressive growl out of your 2.5T!  

Here you can see the power gains with a fully-bolted Mazda 3 Turbo that is tuned vs stock downpipe and stock tuning. 

Dyno information for the Mazda catted downpipe
Dynograph of the Mazda 3 Turbo Downpipe with CorkSport CBE, TIP/SRI – Tuned vs Stock Downpipe + CorkSport CBE, TIP/SRI – Stock tune.

Each Downpipe kit comes with a complete pack of all the hardware and gaskets needed for installation. This includes: 

  • New turbo studs and crimp nuts
  • Stainless Steel V-band Clamp
  • Exhaust connection hardware
  • Remflex exhaust gasket
  • Custom headshield and mounting hardware
Hardware for the Mazda Catted downpipe

Be sure to check out the CorkSport Mazda Catted Downpipe for more images, pricing, and installation instructions.

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Improve Handling for Your 4th Gen Mazda 3 Hatch with the Rear Hatch Brace 

Looking to elevate the handling of your Gen 4 Mazda 3 Hatch to new levels? If that is the case then you may be interested in the new CorkSport Rear Hatch Brace. The 4th GEN Mazda 3 Rear Hatch Brace (aka Rear Strut Brace) is designed for any 2019+ Mazda 3 Hatchback Turbo & non-Turbo model and is a must-have for those wanting to improve chassis stiffness. If you already have CorkSport’s Front Tower Bar, Rear Motor Mount, or Rear Sway Bar installed, this will be the perfect complement for your 2019+ Mazda 3 Hatchback.

We actually introduced this back in April 2023 with a Tech Blog that you can check out here.  Now here is the final product!

2021 Mazda 3 turbo chassis brace

The Need For A Rear Hatch Brace

First, let’s start by addressing why the CS Mazda 3 Rear Hatch Brace is only available for the hatch and not the sedan as well. One of the main benefits of a hatch is that you get ~50% more cargo area than what the sedan offers. This makes it very practical for day-to-day use and road trips but does come with some tradeoffs. The one that is most relevant to us as car enthusiasts is the removal of the support structure that is behind the rear seats. This support structure helps the chassis to better resist flexing and twisting. Since this support structure is missing in the hatch, it results in lower performance when comparing chassis rigidity. This is where the CorkSport Rear Hatch Brace comes into play and leads to an increase in the torsional rigidity of your Mazda 3 hatch, so you get even better handling characteristics 

The Mazda 3 Rear Hatch Brace Has 2 Configurations

Mazda 3 hatchback rear reinforcement bar

Available in two configurations, you can choose just how aggressive of a setup you want. Even if you start with the Stage 1, you can always upgrade to the Stage 2 down the road and carry over the parts you already have. Below we’ll get into more specifics of why you should consider picking up the CorkSport Rear Hatch Brace for your Mazda 3 Hatch.    

Stage 1 – Single Top Cross-Bar

Mazda 3 rear brace stage 2

Stage 2 – Top Cross-bar with Triangulate Lower Bars & Lower Mount

Full Rear Hatch Brace Installed

The Components of the RHB

The CorkSport RHB is made up of two main types of components, the first being the brackets and the other the cross bar/s. The brackets are made out of 3/16in thick carbon steel so the cross bars have a rock-solid base to mount to. The cross bars on the other hand are made from 0.083in wall rectangular carbon steel tubing to provide a strong connection between the brackets. Both brackets and the crossbar get powder coated in textured black to provide a look that will blend in with the interior to give you an OEM look and feel.   

Mazda 3 Hatchback Rear Brace with CorkSport logo and hex bolts

Functional and Stylish Hardware

Connecting everything is stainless steel hardware, but not just your boring hex head bolts.  Being a centerpiece of your hatchback, we wanted the hardware to not just be functional, but look great.  To do that we used countersink head screws with conical washers to give a clean and purposeful look to the CS Rear Hatch Brace and your Mazda 3 Turbo.  

Rear Hatch Brace hardware for the Mazda 3 Turbo

Thanks for checking out the CorkSport Rear Hatch Brace for the 4th Gen Mazda 3 hatchback! If you want to add this mod to your Mazda and get all the benefits discussed above, be sure to head over to the product page for more details.   


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5 Reasons You Need The Cold Air Box Intake System for the 2019+ Mazda 3 Non-Turbo

The CorkSport Cold Air Box for the 2019+ Mazda 3 has finally arrived!  Long awaited since the introduction of the CorkSport Short Ram Intake for the non-Turbo Mazda 3, CX30 and CX50; the Cold Air Box is ready to team up with your SRI and give you the increased performance from cooler ambient air that you’ve been looking for.  

Installed for the Best Cold Air Intake Box

Designed For Performance

Designed specifically for the non-turbo models in conjunction with the CorkSport Short Ram Intake; this creates a complete performance cold air intake system that bolts in with ease.  

To maximize potential airflow AND keep the hot engine bay air away from the intake we incorporated the OEM intake snorkel and opened the airbox end to take in cooler ambient air from the fender area.  

Mazda 3 2019 and newer cold air intake box

Here you can see the open end of the CorkSport Airbox providing full airflow to the filter from the fender area and the opening on the front of the airbox for the snorkel to interface.  The result is maximum airflow and minimal hot air from the engine and radiator.  

Cold Air Box illustration of air flow

Tested & Approved

To validate this design we did on car testing in real-world situations.  Below you will see a graph showing air intake temperature of the CorkSport SRI only vs the CorkSport SRI + Cold Air Box.    Both tests use the same car and begin testing with an up-to-temp car in approximately 80 degF sunny weather.  

Cold Air Intake Data for the Mazda CS Air Box

The testing starts with a 5 minute idle period to simulate sitting in traffic or staging line at a drag race.  This is the “heat soaking” that is so commonly mentioned in social media channels.  After that, the car is moderately accelerated to 50mph which pushes fresh ambient air into the intake snorkel and fender area.  You can see that in both stationary and moving testing, the cold air box keeps intake air temperatures cooler by approximately 10 degF.  

CorkSport Installed on CX30 Cold Air Box

Efficient & Responsive

Is a cold air box necessary for your Mazda already equipped with the CorkSport Short Ram Intake?  No, but the cold air box WILL help your engine breathe easier, run more efficiently and feel more powerful and responsive in all driving situations.  It will help make your Mazda even more fun to drive, which is why we all do this!  

Mazda 3 Cold air box

Built CS Strong

Now let’s talk about the construction of the CorkSport Airbox.  CAD designed and manufactured via a rotor molding process allows us to create very unique shapes that can fit in the engine bay.  The material is XDPE plastic that is very durable and resilient to engine bay temperatures and chemicals.  In fact, it’s the same material we use for our Mazdaspeed Fender Fuel Cell and the 4th GEN Mazda 3 Turbo Inlet Pipe.  The translucent cover is a grey/brown tinted acrylic material that is durable and looks fantastic in the engine bay.  

Mazda CX50 cold air box installed

With the removable cover, servicing is super quick and easy, so you don’t have to remove the entire airbox just to clean your air filter. 

CorkSport Care & Support

Lastly, like all CorkSport performance parts, you receive color step-by-step instructions, all the needed installation hardware, and support from our knowledgeable team at CS HQ.  Thanks for checking out the latest and greatest from CorkSport!  

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CorkSport’s Best Mazdaspeed Coilover Kit Just Got Better

CorkSport Mazdaspeed 3 Coilovers are back and ready for your street and track Mazdaspeed 3 and Mazda 3!   Taking the feedback from the previous generation of CS Coilovers and applying those to the new hotness has created a design that best balances performance for the street and track.  

Best Mazdaspeed 3 Coilover Kit
The Best Mazdaspeed Coilovers We’ve Made

The new design has a handful of changes all meant to improve the driver experience, making it the best Mazdaspeed coilover we’ve made.

No longer using an inverted design, we opted for a more conventional, but performance-oriented monotube design with a pressure chamber.  A monotube design was used for its superior damping response and precision vs a twin tube design.  With that, we have increased the resolution of damping control from a 15-click range to a 30-click range giving you more fine-tuning control. 

2013 Mazda 3 Upgraded Coilovers 
Installed Mazdaspeed Coilover with CS Springs

Next, the fronts now have independent spring load and ride height adjustability.  This gives you the ultimate control in spring setup and ride height without affecting each other to do so.  This helps to keep suspension travel optimized within the damper and makes adjusting ride height simpler. 

Coilover Suspension Mazdaspeed 3
Swift Springs For Coilovers

Lastly, you may have noticed there are two different colored springs.  We are offering two options for springs; CorkSport Red Coilover springs and Swift Spring upgrade. Even though there is no spring rate change for Swift, we still wanted to offer the option for those who swear by them.  We suggest the daily driver opt for red springs and save money for some other goodies like Camber Arms, Toes Arms, or a Rear Swaybar.  If you are wanting to push your car on the track, you may notice the Swift spring upgrade.  Either way, you get to decide!

Talking about springs, we did “soften” the overall spring rates slightly per the requests of the community.  For the balance of comfort and performance, we are using 6k fronts and 7k rear springs.  

Mazdaspeed 3 Lowering Kit Coilovers

Now to the things that you already loved about the Mazdaspeed 3 Coilovers just get better! Included with the front strut assemblies are camber adjustable upper mounts so you can dial in your camber, wheels speed wiring harness brackets for OEM like installation and of course the needed rear hardware and adjustment wrenches.  

Mazdaspeed 3 coilover kit bolt-on hardware

Now let’s chat about ride heights.  While the CS coilovers are designed around handling, we can’t ignore the great visual boost that comes with lowering a car. The CS coilovers offer a large range of height adjustability. In the front, you can adjust the height from ~0.5” higher than OEM all the way down to ~2.0” lower than OEM (+0.5” to -2.0”). For the rear, you can go from ~0.25” higher than OEM all the way down to ~2.0” lower than OEM (+0.25” to -2.0”). This is 2.5” of total adjustability in the front and 2.25” of total adjustability in the rear. 

Mazdaspeed 3 CS coilover max height 2
Mazdaspeed 3 Coilover Maximum Ride Height
Mazdaspeed 3 CS coilover min height
Mazdaspeed 3 Minimum Ride Height

This is a great balance that allows for proper suspension function at low heights for those who want a stance look while also offering an OEM+ look for those that prefer a more subtle appearance. Don’t worry though, wherever you end up on the height range, the lowering does come with handling benefits as well, such as a lower center of gravity, decreased body roll, and improved driver confidence!

Mazda3 Performance Parts Suspension Upgrade

That wraps up the new CorkSport Mazdaspeed 3 Coilovers!  Hope you are as excited about these for your Mazdaspeed as we are!

Now, what’s next on your list, a CorkSport Turbo or a massive 3.5″ turbo back exhaust?

Barett @ CS

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