Oil Catch Can Kit for 2016+ SkyActiv Turbo 2.5L

Skyactiv Turbo OCC Kit

When you think of a performance aftermarket component you typically think of a part that increases the vehicle’s power, but some performance parts don’t. Instead they have a more critical purpose, increasing the reliability of your performance engine and components.  The CorkSport Oil Catch Can Kit (OCC Kit) is just that type of component(s). 

CNC machined Mazda Oil Catch Can

Why is an Oil Catch Can Kit critical for your Mazda?  Despite the huge advancement Gasoline Direct Injection (GDI) technology there are still some downfalls.  Compared to the more conventional port injection fuel systems, GDI is much more prone to engine oil fuel dilution.  This is primarily due GDI injecting directly into the cylinder; in low speed operation and cold starts the fuel simply does not have enough time to fully atomize into a gas before ignition.  This results in some excess fuel seeping past the piston rings into the oil along with any combustion chamber blow by the pistons.  This is fuel dilution. 

OCC catch all the nasty build up from entering your Mazda Skyactiv engine

Here you can see the results of a CorkSport OCC installed for ~3000 miles on a 2018 Mazda 6 2.5T.  This engine only has 500 miles and has an average commute of 15 miles & 20 minutes of mixed traffic and speeds. 

Mazda’s OE design attempts to resolve some of this with a valve cover breather that vents directly into the turbocharger compressor inlet and a PCV (Positive Crankcase Ventilation) valve in the engine block that vents to the intake manifold. 

How the Mazda OCC works

Mazda’s setup depends on the fuel and water vapor inside the crankcase being drawn into the intake manifold and intake system to then be re-ingested by the engine.  This has two major flaws:

  1. The direct crankcase ventilation via the PCV valve only works while cruising (no boost).  Combustion gas blow by will occur most often while in boost under high throttle application when the PCV valve is closed.
  2. This forces the engine to re-ingest dirty air that carries contaminants in the form of fuel and water vapor along with carbon debris.  These containments then build up on the inside of the intake manifold, cylinder head runners, and the intake valves slowly degrading performance over time. 
Carbon build up on a Mazda engine without the catch can

The CorkSport OCC Kit provides you with two major features:

  1. Both the valve cover vent and the PCV valve are drawn from the turbo inlet directly ahead of the turbocharger compressor. Thus both the valve cover and PCV valve have constant vacuum in all driving conditions, both cruising and high throttle application.
  2. The oil catch can itself acts as a “filter” for the vapor and debris that would normally be directly ingested by the engine. The drawn crankcase vapor and debris is separates and collects in the catch can for easy removal during normal oil changes. 

As you saw above, there is a significant amount of vapor and fine debris that is being filtered out of the crankcase air that would have normally been ingested.  As you continue down the path of modifying and demanding more form your Mazda, the need for a OCC System only becomes more and more critical. 

Bolt on Mazda Cx5, Cx9, and Mazda 6 turbo

Front Strut Tower Brace for the 4th Generation Mazda 6

Bolt in STB for the Mazda 6

We’ve heard you asking, we’ve even seen you trying to fit our strut tower brace for the 2014-2018 Mazda 3 onto your 6. We are proud to announce the challenge is over.  We’ve created a new design specifically for the 4th generation Mazda 6 and its available now!

2018-up-Mazda-6-STB

You may have a goal of improved driving experience or you just want a visual improvement to the engine bay.  We are offering both to you. 

The polished aluminum strut bar and powdercoated steel brackets look great under the hood of the Mazda 6 and the added chassis stiffness provides improved handling and driver feedback. 

Bolt in STB for the Mazda 6

Install is a breeze with color step-by-step instructions and included hardware.  If you’re looking to get even more out of your Mazda 6 in those curvy back roads then we suggest a rear swaybar and sport springs to go along with the CorkSport Front Strut Tower Bar. 

This package will really wake up the chassis of the Mazda 6 providing you with a sports car feel from your big sedan. 

2018 and up Mazda 6 lowering springs

Don’t hesitate! Gets your today!

The Solution to all those Boost & Vacuum Hoses – CorkSport Boost/Vacuum Block

Do you ever open the hood to you Mazda and cringe at all the boost and vacuum hoses – You know, the string of hoses and T-fittings winding in every direction?  Here at CorkSport, we’ve had this same feeling and decided to do something about it. 

CNC Vacuum Manifold

Introducing the Boost/Vacuum Block and Fitting Kit…the simple and effective solution for your boost and vacuum accessories.

Mazdaspeed 3 Vacuum Block

This simple part for your Mazda allows you to consolidate your various boost/vacuum hoses to one single source. You can finally rid your engine bay of the numerous T-fittings that plague that single hose that connects your intake manifold and BPV.

All the ports needed for your Speed 3 install

A central boost and vacuum source is plumbed to the block and then distributed to six standard ports with 1/8-27 NPT threads.  If you have a plan and setup you are going for then opt for the Block and Plug Kit.

Easy Mazdaspeed 6 installation

If you are unsure about what you need now or in the future,  then the complete block and fitting kit is your best option.

Optional fittings for the easy installation

Either way you are sure to make a huge visual improvement to your engine bay.  A little effort now will go a long way later with this billet aluminum and anodized boost/vacuum block.

Check it out here and get your today…your Mazda will thank you.

-CorkSport

CorkSport Axle Back Exhaust for CX-9

Bolt on Cx9 turbo axleback Exhaust

With a shop full of enthusiastic car guys and gals we are in love with the look and sounds of the CorkSport Cat-Back on that larger than life CX-9. Customers love the sound, especially when completed with our Skyactiv Turbo Intake, but a few requested a little bit less racecar rumble.

Bolt on Cx9 turbo axleback Exhaust

We are here to give our Cx9 customer what they want which brings us to a new exhaust option for the Cx9 Turbo, an Axleback!

Better than 3 inch Cx9 Skyactiv Turbo exhaust

The Axleback exhaust setup is great because you are still getting the awesome 100mm double wall slant cut tips, the high flow 80mm stainless steel piping, and an exhaust note that will still capture your attention as well as the other Cx9 owners on the road.

Cx9 cat back exhaust system

The in-cab exhaust volume and tone are much more subtle than the catback exhaust setup.  This is your family friendly and wife approved exhaust for the Mazda CX-9. This is the “bluetooth office friendly meeting” exhaust system which is mellow at cruise but throaty when you get into the boost.

Performance Cx9 turbo exhaust system

You can have your cake and eat it too. Check out the product listing for full details.

Mazdaspeed EWGs Made Easy!

We’ve talked a lot about external wastegates with our recent CST6 development but today we are happy to announce the standalone CorkSport External Wastegate Housings for the CST4 and CST5. Available right now as an update for your existing IWG CST4 or CST5, the CS EWG housings make it easy to get the best in boost control for your Mazdaspeed 3, Mazdaspeed 6, or Mazda CX-7 Turbo.

Bolton upgrade to go external wastegate with your Mazdaspeed

While the CST6 will only come with an EWG housing, the external wastegate (EWG for short) is a new concept for the CST4 and CST5. Both of these turbos originally hit the market with an internal wastegate (IWG) only option that has a small flapper valve on the inside of the turbine housing to let off excess exhaust gases. Instead, the CorkSport EWG housings use an offshoot from the turbine scroll that has a v-band flange on the end. This flange allows for the fitment of an external wastegate for improved boost control. To run an EWG on an original CST4 or CST5 previously, you needed an EWG capable exhaust manifold and some sort of block off for the IWG port.


Mazdaspeed 3 turbo internal and external wastegate housings

The new CS EWG housings make running an EWG on your Mazdaspeed3 easier than ever. Each housing comes with the elbow and clamp needed for great fitment. We even offer a dump tube/screamer pipe that works for both MS3 and MS6 as an add-on option. If you pick up the screamer pipe to go with your housing, all you need to supply is the EWG itself. 

Mazdaspeed external wastegate installation kit includes everything but the Tial wastegate

We strongly recommend a Tial MV-R 44mm wastegate as all design work and testing used this specific wastegate. Other wastegates may require modification for use. The 44mm size is a great fit for the Mazdaspeed engines, whether you are running an upgraded turbo on the stock block or fully built one that you intend to push to the limits.


Tial wastegates are a proven turbo commodity for the Mazdaspeed 3

So why would you want an EWG? For starters, EWGs truly offer the best boost control setup for any turbocharged car. Because the wastegate is separate from the turbocharger itself, it is easier to place for optimum boost control, plus, the design of the actuator itself can be optimized. As a result you get a wastegate that hits boost targets more accurately and responds quicker to changes in boost. This means no more boost spikes right when the boost hits (a common problem with poor quality IWG setups), and a near-flat boost curve. The isolated actuator also makes for faster and easier spring changes should you need to service or change your wastegate preload. For more info on the design behind the CS EWG housing, check out the full blog HERE.

A direct flow path for the exhaust gas on the Mazdaspeed 3

One of the best parts of EWG over IWG is the sounds that come with a screamer pipe! While only intended for off-road use, a screamer pipe dumps the exhaust from the EWG directly to the air. This allows for a fantastic noise during a WOT pull, that sounds truly unique. It’s not all just noise though, by venting the EWG to the atmosphere instead of venting the IWG in your downpipe, you are decreasing exhaust turbulence right after the turbine wheel, reducing backpressure. On very high horsepower setups, this often generates some extra power as the turbine housing can be used more efficiently. Check out the product video below for some great EWG sounds from Barett’s MS3.

There’s one final benefit of the CS EWG housings: housing design itself. Without having the IWG in the way to worry about, we were able to do some optimizing on the scroll and A/R. For CST4 owners, this means an increase in A/R from 0.66 to 0.82. Typically an A/R change like this will cause a slight decrease in spool time but an increase in max power potential. CST5 owners have this 0.82 A/R even with the IWG setup but there’s another benefit: greater swallowing capacity. This refers to the amount of volume in the turbine scroll. By increasing the swallowing capacity the turbine can ingest air more efficiently at the peak, which is especially important if you have an upgraded exhaust manifold or high flowing head. After all, an engine is an air pump – what good is shoving more air in if you can’t get it out?

Easy bolt up external wastegate upgrade for your Mazdaspeed 3

If you’re in the market for a change on your Mazdaspeed, check out the CorkSport EWG housings for the CST4 and CST5 turbochargers. Better boost control, a more efficient housing, and best of all, a great new sound. Be sure to check out the listing for even more images and don’t be shy to ask questions we’ll be happy to help!