Time for more horsepower and boost with the Skyactiv 2.5 Turbo engine.
The Mazda 6 just got its next upgrade in the form of the CorkSport Downpipe for 2018-2022 models equipped with the 2.5L Turbo engine. We took the OEM downpipe and improved on it in every way, including sound, flow, power potential, and even ease of install! Help unlock power with the Mazda6 Turbo downpipe and take a step forward to more making power!
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The CorkSport downpipe uses a 2-piece design that starts with a cast 304 stainless steel bellmouth. This provides a high-flowing, smooth transition from the turbocharger to the piping that will stand up to the test of time and the high heat of the turbo. The piping is upgraded from the OEM 65mm diameter to 80mm mandrel bent piping to maximize flow and reduce restrictions. The bellmouth is joined to the piping using CNC machined v-band flanges which ensures a leak-free seal.
The two-piece design is not all about flow through. We optimized the casting design to be easy to install and tighten all the hardware. Since you do not have the piping in the way, like you would with a one-piece downpipe, the mounting hardware at the turbo is very easy to access! Fitment is also spot on, as we used 3D scan data from the OEM downpipe when designing the CS downpipe. That means great fitment with your existing aftermarket exhaust, or even the OEM one! With exhaust, the CorkSport downpipe will change the exhaust note of your Mazda 6. With the full CS catback exhaust, we noticed a different tone with some extra “growl” and a very slight increase in volume. This goes for both the catted and catless setups, with just a hint more drone with the catless setup.
All of the efforts to reduce flow restrictions are in the name of power! By smoothing the exhaust path and eliminating restrictions, the turbocharger can breathe better. While we have not been able to fully tune the car to take advantage of the flow gains (more on that later), typically an upgraded downpipe offers faster spool times, better peak power, and can help hold power better at higher RPMs. We hope to be able to test & validate the power potential of the MZ6T downpipe soon, but for now, know that the CorkSport Downpipe has enough flow capacity to efficiently support 500+ WHP, assuming you’ve got the mods to make that power!
So the elephant in the room: tuning. While the CorkSport Downpipe can be installed and driven on an otherwise stock Mazda 6 Turbo, we strongly recommend a tune after installing the CS downpipe. There are some fairly strict limits to airflow and torque in the OEM tune that can result in some mild surging or “hiccups” especially when at wide open throttle. This is simply the car hitting those limits and pulling back power. We have experimented with these limits and have found no long-term effects of hitting the limits or even going beyond. They are very conservative limits for safety with stock parts. With more efficient parts, your engine works easier and is able to produce added power/torque and consume more air so the limits are simply hit easier.
Let’s go through some housekeeping on the Mazda 6 Turbo downpipe. We offer the downpipe in both fully catless and with a high flow 300cel cat. As modifying or removing the primary cat is illegal in most areas, both options are sold for off-road or race use only. The fully catless setup will be the best for power gains but also comes with an all but guaranteed check engine light. The catted option cuts down on the smell of a fully catless setup but will sometimes still throw a CEL. This CEL can however be disabled with a tune.
Finally, what comes in the box with your MZ6T downpipe? Each kit comes with all the hardware needed for installation. This includes new turbo studs & crimp nuts, exhaust connection hardware, a Remflex exhaust gasket, and the stainless steel v-band clamp for connecting the upper and lower sections. Also included is a support bracket for the downpipe and even a custom heatshield to deflect heat away from engine bay components. Both come with required mounting hardware as well!
Be sure to check out the product listing HERE for more images, a product teaser video, and pricing. Ready your Mazda 6 Turbo for some big power with downpipe kit from CorkSport!
Its 2021, you survived 2020 and finally got those last goodies installed on your Mazdaspeed 3…you’re finally fully bolted. It’s been about 6 months and now you want more, but your Tuner keeps telling you you are out of fuel. What the Hell does that mean!?
Let me tell what that means and let me show you the solution via the BEST Port Injection Fuel Kit for your Mazdaspeed 3 or MPS 3. If you know this is the kit for you don’t wait any longer (Link to ALL THE FUEL), but I do invite you to check out the great information below.
Say no to “out of fuel” and say yes to enough fuel to support 750+WHP! But first let’s take a step back to understand the basics.
Why is your Mazdaspeed 3 “out of fuel”?
The Mazdaspeed 3 and 6 use early technology for direct injection injectors which sadly do not have an aftermarket replacement and reach their flow capacity limit quickly. This basically puts a limit on the OEM fuel systems horsepower capacity. From what we have seen firsthand and in the community; the limit is around 360-390whp depending on the performance parts on the engine and the fuel used. The only current solution is to add a port injection system with either 2 extra or 4 extra injectors. We’ll talk more about that.
What is an auxiliary port injection fuel system? – This is a kit that adds (does not replace) port style fuel injectors to the intake manifold so that you can increase the total fueling capacity of your Mazdaspeed or MPS. There are a few ways this can be done and all have been done in the Mazdaspeed Community.
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2 extra or 4 extra injectors (aka 6th Port or 8th Port Injection)
While the CorkSport Port Injection Fuel Kit is designed for 4 extra injectors (8th Port Kit); there are options in the community that only use 2 extra injectors (6th Port Kit). CorkSport believes the 8th Port Injection kit is the superior setup because it has higher capacity, is more reliable and safer for the engine.
With an 8th Port Kit there is an extra injector on each runner of the intake manifold spraying directly into that one and only runner. With a 6th Port Kit there are two extra injectors spraying directly ahead of the throttle body and then depending on the flow distribution of the intake manifold to disperse the fuel to each runner and thus cylinder.
Return vs Returnless Setups
This is another option for Port Injection Fuel Kits in the community. While both have their place, the CorkSport 8th Port Fuel Kit uses a “return” style setup because again it has higher capacity, is more reliable and safer for the engine because it is easier to tune for.
In a “return” style setup the fuel pressure for the extra injectors increase as boost pressure increases keeping a consistent fuel flow rate per injector duty cycle which provides the higher capacity and much more consistent tuning. While the “returnless” style setup just plumbs the extra injectors into the OEM fuel feed to the HPFP. The fuel pressure does not increase with boost pressure and therefore the capacity is lower, around 500-550WHP.
Integrated vs Standalone Fuel System
Lastly is the consideration of how the Port Injection Injectors are fueled. This can come from the OEM fuel tank or from a completely separate fuel tank in the vehicle. Unlike the bullets points above, this is not really a “one is better than the other”, but more of “what suits the needs of your vehicle and uses”.
As the name implies this means the Port Injection Fuel Kit sources its fuel from the OEM tank and in-tank pump. This can actually be done a couple ways 1) via the “returnless” setup as mentioned above but that has its issues or 2) via a surge tank that is mounted in the engine bay or cabin…which has some concerns.
The surge tank setup is a very common “racecar” setup and for good reason. It handles high G load corning, acceleration, and braking great and also fuels the entire car, not just the port injection system. However the cost is usually much higher and requires relocation of other engine bay components so you can mount the surge tank. Along with that you can only use one fuel for the entire system so if your car needs a special high octane fuel then you have to use it at all times during operation, whether cruising or full power.
In contrary this is a completely separate fuel source via a separate tank. This can be a really great option for the enthusiast that does some spirited driving, maybe some events here and there, but also daily drives their Mazdaspeed 3. How is this the case?
With a completely separate fuel cell for the port injection system you can run the exotic race gas/ethanol in the port injection tank and run normal cheap pump gas in the OEM tank. When you daily drive/cruise you only use the pump gas in the OEM tank and when you want power the port injection kicks in with the high octane fuel. It’s a win/win, especially if you do not have ethanol close by and have to special order the exotic fuel like we do here in the PNW. However this does mean you need a 2nd fuel tank for the port injection which can be a pain, BUT CorkSport has that covered in this complete kit.
Ok let’s recap on where the CorkSport Port Injection Kit for Mazdaspeed 3 fits in:
4 Extra Injectors aka 8th Port Fuel Injection Kit – one injector per runner for more precise fueling
Return Style Setup – Fuel pressure rising with boost pressure for more capacity and precision
Standalone Tank – Cheap pump gas for daily driving and high octane fuel for port injection power in the secondary fuel cell
I don’t know about you, but this sounds like you can have your cake and eat it to!
Image Credit: Shift Sector Coalinga 2020
Let’s look at the components that make up the CorkSport Port Injection Fuel Kit. What’s in the Box:
CorkSport Fender Mounted Fuel Cell
This is a huge element of what makes the CorkSport Port Injection Fuel Kit great. This fuel cell is custom CAD designed specifically for your GEN1 and GEN2 Mazdaspeed 3 to fit hidden under the headlight behind the bumper cover. At 2.6 gallons capacity you don’t need to refill the fuel cell often and there is an integrated level sensor to remind you when you are at 0.8 gallons. No in-cab tanks and smells.
Quantum Fuel Pump
A 380LPH inline fuel pump is used. This is a Bosch 044 style pump that has the flow capacity needed and is e85 safe.
DeatschWerks Fuel Filters
Two fuel filters are used in the system for complete filtration. A pre-pump 100 micron filter filters the fuel flowing from the tank to the pump, therefore protection the pump from debris. A post-pump 10 micron filter filters the fuel even more before entering the fuel injectors, therefore protecting the fuel injectors from very small particulates. Both filters use a dual stage filtration design that incorporates a magnet and a stainless steel mesh media.
Spec’d Length 6AN Fuel Lines
No headaches and ready to go! Like our Mazdaspeed high pressure fuel line, the included fuel lines are the CorkSport Fuel Lines are spec’d to length and fully assembled ready to use. The lines are PTFE lined with stainless steel braiding and a hytrel coating for a sleek finish and protection against abrasion. All fittings minus on 150deg fitting are permanently crimped and sealed.
Fuel Pressure Regulator
An AEM fuel pressure regulator is used for this return style setup. This provides easy adjustment and setup of the fuel rail pressure with the included Fuel Lab Analog Pressure Gauge
Too further simplify, a 30amp relay kit is provided. Relays are a critical component in setting up a port injection fuel system. This allows you to safely and reliably provide power and control to the fuel pump. With that a Hobbs Switch is also provided, this acts as a trigger for the relay to apply power to the fuel pump when a set boost pressure is met. Example: when you reach 4psi the Hobbs Switch will signal the relay to apply power to the fuel pump. This is a great setup for daily driven cars because you only turn on the pump when needed vs running at all times. It greatly helps the life of your pump.
Lastly is all the misc hardware and brackets to get this into your speed. We’ve got this handled and clearly show the install process with the online color step-by-step instructions.
Alright that’s what’s in the box for the CorkSport Port Injection Kit; now let’s talk about the other required items. There are 2-3 critical items needed to get your port injection kit up and running.
Port Injection Controller
The OEM ECU and Cobb/Versatuner tuning options cannot control the extra 4x injectors in the kit so you will need a separate controller and software for this. There is a simple and proven option with the Split Second Additional Injector Controller AIC1. It comes with a ready to run harness for EV6 injectors and the harness integration for power, signal and control are very simple. Check it out here and add it to your CorkSport Port Injection Kit for a one stop shop.
You will need 4x injectors for the CorkSport 8th Port Fuel Kit. The injectors need to have 14mm o-rings top and bottom and the length of 34mm or 48mm (if using the CorkSport intake manifold). To use with the Split Second Additional Injector Controller AIC1; you will want the EV6 connection style. For capacity we recommend at least 1000cc/mm. To cover all these requirements just use the Injector Dynamics ID1050x. They are proven and reliable, you can grab a set right here with the CorkSport Port Injection Kit.
While this is not required for operation, it is highly recommended. The N2MB Racing WOT Box allows you to change the type of Redline and Launch Control cut to a safer method. OEM will deactivate the injectors for this vs the WOT Box deactivates the spark plugs. This is much safer for your engine, especially with running a port injection fuel kit. With this you can also Flat Foot Shift which is faster and way too much fun. (Insert Fireball Emoji Here)
Why doesn’t the CorkSport Port Injection Fuel Kit include these items?
That’s a good question and we have a good reason. Originally the kit was going to, but we asked the community how they would want the kit and the answers surprised us. A lot of people wanted the kit minus the Controller and the Injectors because they already had those items. So we pulled those out of the kit as solo items you can choose to add if needed.
Installing this kit into your Mazdaspeed 3 is a day project with some buddies. Bank on 6+ hours due to the wiring (its always tedious, but important to do right). Read the installation instructions before starting the install so you are ready with all the needed tools and supplies for wiring.
I do want to note that like any project that involves wiring, there will be some wiring required for the install and the extra wiring and connection you decide you need are not included in the CorkSport kit. Every car is different and how each person wants to get things wired up is different. There is also some very minimal drilling required to install the tank mounting brackets.
I hope you found this blog helpful and informative not just to learn about the CorkSport Port Injection Fuel Kit, but to also learn about the other setups and options you can choose from. I hope this helps you decide what is best for your car and goals. Give us a call if you have any questions, we’d be happy to help.
Barett @ CS
Mazdaspeed 3 Port Injection Fuel Kit November 15th, 2022CorkSport
Looking to take the next step on your MS3 journey and move beyond the limits of stock fueling?
Look no further than the CorkSport Auxiliary Fuel Tank for Mazdaspeed 3. We incorporated a ton of features into an aux fuel tank that sits in front of the driver’s side front tire. By using rotomolded construction, we were able to maximize the volume and ease of use to really make a fantastic starting point for your fuel system. Be sure to read on for more info and check out the product listing for full details!
The main focus of the CS aux fuel tank is to maximize capacity without compromising usability and features. We chose rotomolded cross-link HDPE construction to do this. Manufacturing the tanks with this method removes a lot of the restriction that comes with sheet metal tanks so we could keep the tanks cheaper for you while incorporating extra features.
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Adjustable mounting brackets
We were able to maximize the tank to approximately 2.6 gallons for both the GEN1 and GEN2 while retaining great fitment. We even incorporated adjustment into all of the mounting brackets to account for manufacturing and setup variances from one car to another.
Along with fitment comes the flexibility to make the tank work best for your fuel system. We have incorporated mounting locations for both methanol pumps and a standard 044 style mounting bracket. This means you can run a basic single nozzle meth setup while on stock block, then move to a full PI setup once you build your engine, all while using the same tank.
The CorkSport MS3 aux fuel tank also incorporates a bunch of other great features:
An included low level sensor and warning LED that will trigger with ~0.8 gallons remaining in the tank. This gives you plenty of warning before running your aux fuel system dry.
A sump is molded into the bottom of the tank for the fuel pump feed. This prevents fuel starvation from fuel slosh during hard cornering.
A fuel return port is present for use with full port injection setups. If running methanol, this port can be easily plugged.
Warning light, anti-leak, easy refueling, and more!
A billet aluminum cap keeps the tank sealed. Dual O-rings are used to keep the cap in position and prevent any leaks, even if the tank is upside-down.
The tank fill neck was carefully sized to fit with most gas can nozzles and funnels for easy refueling.
An included vent tube keeps tank pressure in check.
The CS aux tank is made from rotomolded 0.19” thick HDPE. This is the same material that most racing gas cans are made from, so you know it will be safe no matter the fuel you use. Each mounting bracket is laser cut and precision formed 304 stainless steel for strength, a great look, and corrosion resistance.
Each cap is made from black anodized billet aluminum for reliable and easy use while being stealthy in your engine bay. Finally, each tank comes with full color installation instructions and CS customer support so you can be sure you will be in a good spot for the rest of your fuel system.
By replacing the stock camber arms with the CorkSport Adjustable Camber Arms, you can adjust your suspension to accommodate for lowering springs or coilovers and fine tune your Mazda 6 or Mazdaspeed 6 to the appropriate camber setting needed to balance uneven tire wear and improve cornering performance.
Our design offers +OEM to – 4.5 degrees of adjustability along with cross camber adjustment allowing drivers the ability to align their suspension to match their enthusiastic driving style on and off the track.
Unlike other adjustable camber arm options on the market, our unique design includes spherical bearings that replace the soft rubber bushings on the OEM camber arms, providing a true attachment to the suspension of the vehicle for improved handling and road feel.
The ease of adjustability on the vehicle and the unique nature of the spherical bearings will provide you with improved cornering control that can’t be matched by any other options on the market today.
The CorkSport Adjustable Rear Camber Arms are also available for all Mazdaspeed 3 and Mazda 3 vehicles and back for Mazdaspeed 6 and 2004-2008 Mazda 6 vehicles. They come as a set for just $199.00.
The CorkSport Advantage:
Superior Design: Spherical bearings replace the soft rubber bushings used in OEM and other aftermarket camber arms. This will truly attach the camber arm to the suspension of the vehicle for more control and added road feel
Made from reinforced high strength extruded bent steel tubing: Stronger less brittle and more durable than aluminum
Fine Tuned Adjustability: +OEM to – 4.5 degrees of camber adjustment and cross camber adjustability for fine tuning of your suspension
Full Adjustment: Can be adjusted on-car with a wrench while still installed in the vehicle
Sold as a Set: We know you need two so we simplified the math for you by selling them as a set
For more information about the CorkSport Adjustable Rear Camber Arms, check the listing here!
Mazdaspeed 6/Mazda 6 Rear Adjustable Camber Arms November 3rd, 2022CorkSport
We are happy to announce the return of the CorkSport Adjustable Front Upper Control Arms for Mazdaspeed 6 and GEN1 Mazda 6 to complement the return of the CorkSport Adjustable Rear Camber Arms. Back and better than ever, the CS control arms provide improved handling and easier wheel fitment through front camber adjustability. An impressive 4.5 degree adjustment range ensures you are able to get the camber you want. Whether you are dialing in your handling for the track, correcting your added camber from lowering, or even just adding in more camber for that new wheel and tire setup, the CS adjustable control arms are a good fit for your build.
The focus of the CorkSport Adjustable Control Arms is an easy modification of the OEM camber setting. You only need to jack up your car to easily access the four bolts on top of the control arm. Once loosened you can adjust as needed before tightening everything back up and lowering your car, without even removing a wheel! It’s a great setup for correcting camber from pothole damage or lowering, optimizing your alignment for the track, or adding negative camber to get the stance you want to fit that new wide wheel setup.
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Modify your Camber setting without needing to remove your wheel!
At CorkSport lowering spring height (1.5” lower than OEM), our local race alignment shop measured an adjustment range of approximately +0.5° to -4.0°. During the measurements they even complimented how easy the CS arms are to adjust! If you’re lower than CS spring height, you are able to go even more negative due to the natural camber gain of the MS6 double wishbone front suspension. While if you are higher than CS springs, you won’t be able to go as negative.
Truly an easy bolt-in installation with no strange handling geometry changes
Because the CorkSport upper control arms replace the entire OEM upper control arms, we knew that fitment was vital to ensure correct handling characteristics, and an easy installation. These arms were designed directly from the OEM control arms so they are truly an easy bolt-in installation with no strange handling geometry changes. With the added camber adjustment, we also verified clearance throughout the suspension travel and at all camber settings to prevent any strange noises or damage to your vehicle.
We have put the CS adjustable front camber arms through extensive real-world testing to ensure long lasting strength for your car. We have been testing an early production unit on a MS6 for around 6 months at the time of writing. This car has been used in everything from daily driving, to aggressive driving in the twisties, to even hauling heavy loads around. Throughout all of this, the car has been setup with -3° of camber with a 255/40-18 summer tire on a 9.5” wide wheel. We have seen consistent performance out of the CS control arms with no issues whatsoever, so you can be sure they can take whatever you can throw at them!
Each set of CorkSport Adjustable Control Arms is made from A513 steel for long lasting strength and durability. The camber adjustment box on the arms are gusseted for added strength and rigidity. The arms are then finished off with a black powdercoated finish for long lasting corrosion protection and a great look. Each kit also comes with brand new ball joints, castle nuts, and cotter pins to keep everything operating correctly. Plus, we upgraded the rubber bushings where the arms mount to the chassis to spherical bearings. This change ensures good consistent handling feel and reduces slop that can result from old worn out rubber.
That about sums up the CorkSport Adjustable Control Arms for Mazdaspeed 6 and GEN1 Mazda 6! Be sure to check out the product listing for more images, as well as our product video to see these arms in action. If you have any questions, shoot us an email or give us a call, we’re always happy to help!
Mazdaspeed 6/Mazda 6 Front Adjustable Camber Arms October 31st, 2022CorkSport