Skyactiv 2.5T Intake Heat Shield

OEM Look and solid performance power gains for the Mazda 6 Turbo

We’re back with another product for SkyActiv 2.5T owners that a lot of you have requested after getting your CorkSport SRI. Introducing the CorkSport Heat Shield for 2018+ Mazda 6 Turbo, 2019+ Mazda CX-5 Turbo, and 2016+ Mazda CX-9! Cool down your intake air temps in two ways: by blocking heat from the engine bay and by using the OEM ducting to draw in fresh air. This allows your turbo system to breathe just a bit easier, especially during hot days or if you’re stuck sitting in traffic. Plus, it makes the CS SRI look like a factory option performance part!

Read on for full details and be sure to give us a call if you have any questions!

Isolates heat from the Mazda 6 turbo SRI

We really focused on keeping cool air around the filter with the CorkSport SkyActiv 2.5T heat shield. The shield was carefully designed to seal the intake off from as much engine bay heat as possible. This meant a complicated 2 piece design that is riveted together. We also designed the shield to work with the OEM air ducting. This directs cool outside air to the filter, further reducing intake air temps. The shield is also left open to the area in front of the tire, underneath the headlight. We found that this area gets some fresh air during driving as well, further keeping air temps down.

Cx9 Turbo cold air intake heat shield
CorkSport Heatshield

Now what benefits does cooler air offer? The basic generalization is that since cooler air is denser than warmer air, your engine can ingest more air per cycle, and make more power. When a car is turbocharged though, this gets a little more complicated as you have a turbo that compresses and heats up your intake air and then an intercooler that cools down the boosted air before even getting to the engine. What that means is that the “colder air will make more power” generalization may not hold true, especially with how advanced modern turbocharged vehicles have become. What colder intake air does offer you is a less stress on your turbo system. Colder air means your turbo does not have to work as hard to flow the same amount of air at the same boost pressure. In addition, colder intake air can translate to slightly cooler air exiting your turbo and heading to your intercooler, taking some stress off the intercooler as well.

Cx5 Skyactiv 2.5T Performance airbox
See the video

Enough theory, let’s talk results! In both daily driving testing and in torture testing on the dyno, we found decreased intake air temps with the CorkSport Heat Shield installed. When cruising or when it’s cold outside, we were actually surprised at the low intake temps of the CS SRI alone—there’s actually a surprising amount of fresh air that gets into the engine bay. Where the heat shield really comes into its own is when sitting stationary or driving on a very hot day. That’s when we saw our biggest improvements in intake air temp.

While we did not see any notable changes to horsepower, our torture testing on the dyno really shows what a worst case scenario would look like for intake temps. Check out the graph below that compares the CS SRI alone vs. the CS SRI and heat shield combo. This is a little exaggerated due to decreased airflow on the dyno but is similar to what your engine could see when sitting in traffic on a hot day, then accelerating back up to speed.

Performance Skyactiv 2.5T air temp data
CorkSport

The CorkSport Heat Shield is made from laser cut and precision formed carbon steel. We chose carbon steel for great strength and lower heat transfer than aluminum. For corrosion resistance, the heat shield is finished off with wrinkle black powdercoating. This coating also gives the heatshield a great look that helps it blend in with the rest of the engine bay and make the intake system look like a factory performance part! The two sections of the shield are attached together using stainless steel rivets for a great look and long lasting strength. Lastly we include rubber edge seal to keep as much heat out as possible, and to prevent any vibration or unwanted noise.

Mazda Cx5 Turbo Short Ram Intake OEM Look
CS Heatshield

If you’re looking for the next mod your Sky 2.5T or have been holding off on the CS SRI until there was some heat protection, check out the new CorkSport Heat Shield. We are even offering a package deal! If you purchase the heatshield and SRI together you will save $20.

For early adopters of the CS SRI, we have not forgotten about you! We are also offering the same $20 discount on the heatshield for a short time. When placing your order, enter coupon code heatshield20, and in the customer notes, enter your original SRI order number. BAM – $20 Savings!

Finally, we’ve got some new silicone colors coming for the CS SRI! They aren’t quite here yet but if you’re looking to add a splash of color in your engine bay, wait just a bit longer! That’s all for now, be sure to check out the product listing for more images of the heat shield and give us a call if you have questions!


Mazdaspeed Cast Exhaust Manifold

Today is a huge day for the Speed community; one that has been coming for a long time with both celebration and frustration. Never the less time is up and this project is ready for the community as a whole!

We are proud to announce the Performance Exhaust Manifold for the Mazdaspeed 3 & 6! With over 2 years in development, the MPS exhaust manifold has been long waiting, but for good reason. A project of this scale does not happen overnight; many variables have to be considered, evaluated, and verified.  

I’m confident you have seen “leaked” images from our 6 Alpha and Beta testers over the recent month, but we can make it official.  

CorkSport

But with so many options currently available what makes the CorkSport option compelling? Why should you care?  

That’s a great question and one that can easily be answered with multiple great reasons. The most obvious is the design: this includes the overall shape and the type of material & manufacturing.  

Mazdaspeed Exhaust Manifold

Material & Manufacturing: In our initial investigation and vetting of this project we strongly considered two primary manufacturing methods; Casting and Tubular fabrication (check out the blog here). In a nutshell, we opted for a cast manufacturing method because it reduced the chance of failure modes, reduced the overall size and weight, and gave us more flexibility in design.  

Like most exhaust manifolds, we opted to use 304 stainless steel because it is corrosion-resistant, handles heat well, and is a common and cost-effective material.  

Check out our other Blogs

Following up is Design: The list of details that went into the design is far too long to list here, but we can cover the major items that define the CS Exhaust Mani. With investment casting, we had a lot more flexibility in design with the bend radius, diameters, and wall thickness of the individual runners. This allowed us to increase the inner diameter of the runners to 1.59 inches, achieve a 0.200-inch wall thickness, and fine-tune the path and bends of each runner to optimize runner length and flow.  

Check out our other Blogs

With that flexibility in design, we were able to increase peak flow and improve flow balance per runner. Overall we were able to increase peak flow 45% over the OEM manifold and 33% over the XS Power V3.  

Next up in design, and arguably the most exciting and unique aspect, is the modular flange system.  

Mazdaspeed Exhaust Manifold

This is unlike any other manifold available for the Mazdaspeed today…you can choose your flange between OEM Stock Flange, Precision V-Band, or T3. Sure all these options are available today from other options, but none are modular. Say you pull the trigger on the OE Stock Flange today, but a year from now you want to upgrade your build to a Precision V-band flange. With any other manifold, you would have to buy another $900+ manifold to get the new flange, but with the CorkSport Exhaust Manifold, you just have to get the new flange elbow for your setup. This is MUCH MUCH cheaper and easier to change!

CorkSport

Speaking of install, compared to the typical performance exhaust manifold the CS design is cake to install. With the modular design, you are not fighting the entire bulk for the manifold and flange at the same time. You can leave you turbocharger unmoved connected to the downpipe and intake system, you just install the flange elbow after the manifold is in and bolted to the engine.  

Mazdaspeed Exhaust Manifold

Making life even easier…we opted to develop a pre-fabbed dump tube (screamer pipe) for the Tial 44mm EWG. This is an optional feature for the kit, but one we highly suggest because it’s just so damned easy. Designed for MPS 3 and MPS 6, it fits around most standard downpipes and dumps below the sub-frame right behind the drive axle. Also included with each kit is a SS heat shield that is required for the GEN1 and GEN2 Mazdaspeed 3. You Mazdaspeed 6 guys just get a cool garage ornament.  

So how does the CS exhaust manifold stack up on power? 

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First up is a fully bolted CST4 MS3 with a 6th port fuel system: Comparing the CS EM to the OEM EM, this drop-in test we found that the turbo was spooling faster, carried more mid and upper range power and held that gain through to redline. Overall it improved power under that curve which is what truly makes a car fast and fun to drive.  

Check out our other Blogs

Next up is a fully bolted and built CST6 MS3 with 8th port fuel system: Just like the previous graph, we saw an improvement in spool, mid and upper rpm ranges, and carried it to redline. The difference here is the exhaust manifold we are comparing. This is showing the difference between the CS EM and the XS Power V3.  

With that being said, the CorkSport Exhaust Mani has been proven to 685whp on this same car and with the CST6. We are confident the CS exhaust manifold has far more capacity to support; if we have anything to do with that we will prove it. 

Mazdaspeed Exhaust Manifold

Lastly is sound…we’ve been asked a lot about the sound. How will it affect the sound? Will it sound like a Honda now? Will it be louder?  

We knew the sound was critical because let’s be honest…we are all car guys/gals and Mazdaspeed has a great unique sound to it. We did not want to lose that so we did our best to hit performance goals without sacrificing the Mazdaspeed grumble.  

One of our Beta testers put together a great video comparing the sound of OEM vs CorkSport. The car is a GEN1 MS3 with a built engine, full bolt-ons, CST4, and Cobb Exhaust system. Check out this video link for sound!

In our design, we kept a varied length runner design to help maintain the Mazdaspeed grumble. We believe we succeeded in keeping that classic grumble, but also refined the sound a bit. We like to describe it as exotic. Either way, the grumble lives on, and honestly, none of our beta testers can stop grinning ear to ear with every WOT pull.  

With that being said act fast! We know these are going to fly off the shelf and we are going to do our damn very best to keep them in stock for everyone, but don’t wait!

Grab yours here!

Thanks for tuning in with CorkSport Mazda Performance.  

-Barett @ CS

Performance Parts for the SkyActiv-G Turbo 2.5L

About a year and a half ago we launched our first performance part for the highly anticipated turbocharger 2.5L SkyActiv-G; the Short Ram Intake. This being the first factory turbocharged engine in a Mazda since the long-missed Mazdaspeed 3 in 2013. We were eager to start developing new and exciting products for the Turbo SkyActiv…and trust me that passion has not slowed down.

Today we are going to give you a sneak peek of what’s to come for the Sky Turbo 2.5L through 2020.

2018+ Mazda 6 Turbo 2.5L – Sport Lowering Springs

First up is not necessarily a new product for your Mazda 6, but is an iteration in response to the feedback we’ve received. The current CorkSport Sport Lowering Springs for the 2018+ Mazda 6 (shown above) are sporty, comfortable, and provide a balanced drop of 1.0” Front and 0.75” Rear. While many have praised the springs in their current iteration, some have asked for a more aggressive feel and stance.

We’ve heard you and we are taking action. We are currently developing more aggressive sport springs that will drop the ride height further and bump up the springs rates a bit; we are calling these the “LowLow” springs. Since we are still in development we have not finalized the ride heights and springs rates, but we have a target drop of approximately 1.5” Front and 1.65” Rear.

2018+ Mazda 6 Turbo 2.5L Short Ram Intake

Next up is a new product and one that many of you are asking for. While the Short Ram Intake does increase performance and looks great riding solo in the engine bay, we’ve decided to develop a heat shield kit to further compliment the SRI. We are in the final testing and validation stages, seeing great results with cooler intake air temperatures.

We will be launching the heat shield kit as a solo option so you can upgrade your current SRI system and in a bundle deal if you are looking for a complete kit for your Turbocharged Mazda 6, CX-5 or CX-9.

CorkSport

Next up is a completely new option for the SkyActiv turbo platform…high-performance turbo inlet pipe. This is the first turbo inlet pipe option and is designed to install with the OEM battery, but why is this important or exciting? Just like the Short Ram Intake, improvements inflow in and out of the engine increase efficiency and thus overall power potential.

Turbo inlet pipes are a common upgrade for the Mazdaspeed platform as performance requirements increase. While most of those turbo inlet pipes are manufactured from aluminum pipe or silicone, the SkyActiv-G Turbo Inlet Pipe will be manufactured from cast aluminum. This allowed us to maximize space with a unique shape and still maintain OEM like fitment. Stay tuned for more info on this project.

Did you notice that there is a blue and red silicone coupler on the intake system? In the very near future, we will be providing silicone color options for the Short Ram Intake: Black, Red, Blue so you can choose a style that fits your car best.

CorkSport

Lastly is the other side of the engine. To complement the CorkSport 80mm Cat-Back Exhaust, we are developing a High-Performance Downpipe in two setups. Race Only Non-Catted and Street Catted setups.

A first for CorkSport, we are designing the downpipe in a “modular” design that will drastically reduce the difficulty in installation and improve durability. The upper section directly bolted to the turbocharger is a cast 304 stainless steel with included heat shield and the lower section is thick-walled 80mm stainless steel piping. They connect via a v-band clamp for a simple install process vs wrestling the entire downpipe into the car and onto the turbo.

Wow, that was a lot, and trust me there is more we are investigating, but we can’t let ALL the secrets out yet. We would love to know what products you would like CorkSport to develop for the 2018+ Mazda 6 SkyActiv Turbo platform, you can do so right here by Submitting a Product Idea.

Thanks for tuning in with CorkSport. We hope you are as excited about the 4th Gen SkyActiv Turbo platform as we are!

-Barett @ CS

2019 Mazda 3 – What’s new with the suspension?

With the introduction of the 4th generation Mazda 3 there are many questions around the new chassis, engine, interior, and many other components. Here we are going to start investigating the suspension as we move through the process of developing sport lowering springs for the 4th Gen Mazda 3.

View all Mazda 3 Parts

If you didn’t know already, we recently purchased a 2019 Mazda 3 Premium with the 6 manual transmission and Snowflake white paint. Right out of the box the 2019 has impressed us with its intuitive driver feedback through the steering wheel, pedals, and gear shifter. The interior is phenomenal and the exterior is…growing on us.

BUT enough of the chatter lets throw the car on the lift and take a look at the suspension.

CorkSport

At the front of the car, we have a pretty typical McPherson strut assembly with a lower control arm. This type of suspension is very common in modern passenger cars because it is simple, durable, and cost-effective. There are tons of aftermarket support for this type of suspension because it is so common, but from a purely performance standpoint, it does leave something to be desired.

Comparing the 2019 to our inhouse 2018 3rd Gen you can see one major difference. The connection from the steering knuckle to the strut body is now a simple clamp collar vs the two-bolt connection on the 3rd gens. We imagine this was purely a cost-cutting design change. For you, the result is just a slightly more difficult installation.

View all of our Lowering Springs

At the rear of the car, things are drastically different. Instead of the more standard multi-link trailing arm suspension, we have a torsion beam style suspension. Mazda says this was “to reduce unwanted movement in the suspension and increase driver comfort”, but sadly we believe this is straight-up cost cutting at the sacrifice of performance.

Check our 3rd Gen Suspension options

We could go into a bunch of nerdy details here, but in a nutshell, going from multi-link trailing arm to torsion beam takes away our ability to adjust and control camber, toe, and rear roll stiffness because all of these major suspension dynamics are integrated (or discarded) with the torsion beam design. Never fear, the Team at CorkSport Mazda Performance is working on solutions to this, but it will be a challenge.

Now specifically looking at the rear springs, you can see that the spring is very short. This caused some difficulty in design, but we have successfully overcome this hurdle.

View all of our current lowering springs

We’ve tested the OEM springs rates and WOW are they soft. We developed prototypes to validate our target springs rates and have been driving on those for about a few months now. Happily, from this testing, we’ve found that the OE struts/dampers damping rate is more than sufficient for proper sport lowering springs. With that complete, we’ve designed multiple sets of lowering springs with various ride height targets and our tested springs rates.

Lastly, we tested various final prototypes to get our final ride height just right. Ladies and Gentlemen, these will be LOW and will work with Sedan, Hatch, AWD, and FWD!

We are excited to release final production units to the public in #twoweeks. It is important to note, CorkSport 7th Gear Members will have an opportunity to purchase these springs a week before the general release and they will receive free shipping (in the lower 48 states), as part of their membership benefits!

If you have not seen what the future holds for your 4th Gen Mazda 3, see our product pipeline blog here. If you have ideas or feedback, please let us know. We are listening, we want to hear from you!

-Barett @ CS

2018+ Mazda6 Performance Exhaust for the 2018-up 2.5T

Mazda did a great job bringing a turbocharged engine back to the Mazda 6 (Mazda 3 next please?), but may have done too good of a job of keeping it quiet. Say hello to the CorkSport 80mm Cat Back Exhaust and Axle Back Exhaust for 2018+ Mazda6 equipped with the turbocharged 2.5L engine. If you’re interested in waking up your SkyActiv-T in both excitement and power, read on as we breakdown the newest CS exhaust.

As with all CorkSport exhausts, the goal of the MZ6 2.5T exhaust is to improve power and sound by improving the flow of the OEM exhaust. We started by increasing the size of the piping from 60mm to 80mm. That is an increase of over three-quarters of an inch to really help your turbocharger breathe better. In addition, the CS exhaust system eliminates the crushed areas present in the OEM exhaust and replaces the restrictive muffler sections with pass-through resonators. These resonators control volume and drone without affecting power output.

All that extra flow does mean a power increase. In our in-house dyno testing, we saw an increase in 5-6WHP just by bolting on the CorkSport  Cat Back Exhaust. Check out the dyno sheet down below to see. This increase came with no tuning changes, no check engine lights, and the only other mod being the CorkSport Short Ram Intake, which was installed for both tests. With the 80mm piping size, this exhaust is ready to support future modifications and would likely show more power gains with proper tuning.

The CorkSport MZ6T exhaust is more than just function. We went through multiple iterations and designs to ensure the best sounding exhaust for your 6. The finished product ups the volume without being annoying to daily drive yet still sounds great when in hard acceleration. We strongly recommend you watch the video below to hear what to expect from this exhaust.

If you feel the video below gives you too much volume for the daily, then check out the Axle Back Only Exhaust.  Recently added to the CorkSport line-up, the Axle Back alone adds a mellower, but still noticeable tone to the exhaust.  This is a great middle ground between the CorkSport Cat Back and the stock exhaust.

To give a great looking, long-lasting finish to each exhaust, they are manufactured from fully polished 304 stainless steel. To ensure a high quality fitment, all components are precision TIG welded together on jigs made from OEM exhaust components. Lastly as a finishing touch, we use 100mm dual wall exhaust tips. They fill out the bumper cutouts and are extended slightly to give a classy look and enhance the new Mazda 6’s styling.

The CS Mazda 6 Turbo Exhaust comes with all the hardware and gaskets you need for installation, high quality instructions, and CorkSport support for any questions you may have. Pick up a CorkSport MZ6 2.5T Exhaust today and liven up that daily commute.