Mazdaspeed 3/6 CST4 Turbocharger

Mazdaspeed 3/6 CST4 Turbocharger
Mazdaspeed 3/6 CST4 Turbocharger

Mazdaspeed 3/6 CST4 Turbocharger

Dumptube
Wastegate Type
Regular price $1,199.00 USD
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This item is sold out in Winnipeg. However, may be in stock at one of our warehouses! Email us to get an ETA! sales@ossmotorsport.com

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Since 2015, the Mazdaspeed 3 Drop-In Turbo has been one of the best performance upgrades for the platform.

Proven by thousands of community members, the CST4 is a perfect fit for the mildly modified Speed 3 and Speed 6 using stock fueling up to budget built engines with FBO and auxiliary fueling. Replace your KO4 with the easiest and most complete performance turbo for the Mazdaspeed and have room to grow to 450whp capabilities with the CST4.

The CST4 features a MHI Journal Bearing CHRA, OEM Fit Compressor Cover, and choice between 0.66 A/R Internal Wastegate or 0.82 External Wastegate Turbine Housings.

The CST4 external wastegate turbine housing is designed for 44mm EWGs (Tial is a great option) w/included EWG elbow pipe & V-band clamp.
Includes a FREE CorkSport 3.5 bar MAP sensor for accurate boost pressure up to 37psi.

 

 



Mazdaspeed Mistu 18G turbocharger upgrade

Drop In Performance:

Don’t let the size fool you; the CST4 packs a punch for such a compact and OE fitment package. From full bolt ons to fully built with auxiliary fueling, the CST4 will support power from 250-450whp while maintaining quick spool and great transient response between shifts


a better Mazdaspeed 3 turbo than the BNR S3 turbocharger

Stock Flange Fitment:

The CorkSport CST4 was designed with simplicity and bang for the buck power in mind. Maintaining the OEM compressor inlet size means you can use any intake on the market designed for the stock K04. Same goes for the turbine side with OEM flanges for compatibility with your OE fit downpipe and exhaust manifold.


MPS3 Turbo Upgrade

Billet Compressor:

Utilizing a custom MHI 18G billet compressor wheel, the CST4 can efficiently support 50 lbs/min flowrate and boost pressures to 30psi. Compared to cast counterparts, modern forge milled wheels provide higher boost thresholds, improved response, and increased efficiency to get more power form a small package.


how to get a 400hp Mazdaspeed 6

High Flow Turbine:

Paired with the compressor wheel is an MHI TD05H high flow turbine wheel. This wheel uses a 9-blade design which reduces overall rotating mass and thus improves response and spool.


Better performance Mazdaspeed 3 turbo over the BNR S3

High Performance CHRA:

MHI Journal bearing CHRA housings are used for both the CST4 and CST5 turbochargers for their increased cooling capacity and proven reliability.
High performance journal bearings and a 360 degree high performance thrust bearing is used.
Comparing the compressor and turbine wheels, we have a wheel size ratio of 1:21.


CNC Billet Speed3 Wastegate Actuator

Billet Wastegate Actuator:

One-off billet actuator is used for the CST4 so you can operate the turbocharger in bleed mode for the OE EBS or in interrupt mode with the CorkSport EBCS for increased boost control


Mazdaspeed 3 turbo installation hardware

All Hardware Included:

The CST4 comes will all the necessary hardware for installation saves you time and money on gaskets, studs, and the specialty parts.


MPS3 turbocharger upgrade

Choose your Boost Control:

Do you want an easy to use Internal Wastegate setup or an External Wastegate setup and screamer pipe? You decide with the CST4!
Internal Wastegate setup includes the 0.66 A/R IWG turbine housing and IWG Actuator.
External Wastegate setup includes the 0.82 A/R EWG turbine housing and V-Band Clamp & Elbow designed for 44mm EWGs. (EWG and Screamer Pipe Not Included).

Don’t worry, if you want to change your setup from IWG to EWG later you can.


Check Out the External Wastegate Development Blogs Below

 

Does your Mazdaspeed need an EWG:

Click To View

 

External Wastegate Testing:

Click To View
Additional Features
    • Vehicle Fitment: 2006-2013 DISI MZR found in the Mazdaspeed 3/6 & CX-7.
    • Designed in America: in Vancouver, Washington, in the Pacific Northwest.
    • CorkSport Service & Support: 1 year limited warranty, full color installation instructions, all necessary components, and knowledgeable telephone support at (360) 260-2675.

  • Upgraded HPFP Internals and COBB AP/Tune is required with this product.
  • Auxiliary fueling required for peak power operation of this turbocharger.
  • Some aftermarket downpipes will NOT clear the EWG elbow that is included with the CorkSport EWG Turbocharger.
  • EWG variant designed for Tial 44mm or equivalent external wastegates (not included but available).
  • External wastegate is NOT included with turbo. Did we mention it is not included, because it is not.
  • EWG dumptube/screamer pipe is NOT included with turbo but can be added as an option.

 

How To Install Your Mazdaspeed 3 and Mazdaspeed 6 Upgraded Turbocharger

It will take you 5 hours to install the CorkSport Mazdaspeed CST4 with our easy-to-use instructions.

 

5 Hour Install Time

5 Hour Install Time

 
Difficulty: 4/5

4/5 Difficulty

 
1-Year Warranty

1-Year Warranty

 
No CEL

No CEL

View Instructions

Tracking will be sent once it leaves our warehouse.

For Canadian shipments, if the item is at a US address, the item needs to be brought into our Winnipeg warranty prior to shipping out to the destination.

Tracking information will be received once it leaves Winnipeg.

Please note, average turn around time for this is roughly 2 weeks, if the product is in stock.

Absolutely NO refunds/exchanges on special order items. If return of a non special order item is requested, customer must pay shipping and it must be requested within 14 days of purchase. 

Any orders not picked up by the customer within 15 days after notification of arrival becomes property of OSS Motorsport Ltd. no credit or refund will be given.

Customers that remove product(s) from OSS Motorsport will have been deemed to agree with all of the above terms and conditions. All items sold are for Off Road Use Only.

All performance modifications are done at your own risk and may void your warranty.

UNWANTED ITEMS

Unwanted items are subject to a 20% restocking fee, in addition to the return shipping to our warehouse(if applicable). Used items cannot be returned.

Electronics

All Electronics are final sale!

TERMS AND CONDITIONS

Please have your mail box or junk mail box checked for status updates.

Shipments, returns & refund

During the payment process, we provide delivery options with different delivery companies with which we have no contractual relationship. We offer commission free this added service so the client can receive its order without having to round trip to our warehouse. If there is any problem with the delivery, it is the consignee responsibility to contact the delivery company he/she dealt with directly. The carrier provide a limited insurance of 100$. If you need more, please contact us prior to purchase as we will get you the quotation for extra insurance from the carrier you will select.

NO return accepted. Exchange upon approval and proof of factory default.

Partial or full refund requests are subject to 5% administrative fees. Refund is immediately issued upon cancellation and a confirmation email is sent. However, depending on the payment method used, it may take one (1) to ten (10) days for the refund to appear in client account.

Special orders are non-refundable.

United States orders may be subject to Custom fees and tax as we ship from Canada. 

Disclaimers:

Some products may be used for off-road only. Customer is responsible to check with his/her local/state laws and ordinances.

We are not responsible if the client ordered the wrong item, which does not work on its vehicle.

All parts required professional installation, there is no return or exchange if the client does not know how to install it him/herself.

OSS Motorsport is not responsible for defective or damage caused by unprofessional installation or misuse of the product.

Privacy Policy

We are committed to the privacy of the client's information. OSS Motorsport does not, and will not, distribute, disclose or sell any of the client's personal information to third parties, other than as required by law or as necessary to process a payment. During the process of providing payment information, client may be asked to provide his/her name, address, e-mail, phone number, and where payment is concerned, credit card number, billing address, security code and expiration date.  When users access our site, we may automatically collects information, including IP addresses and information regarding the client use of the site through cookies or automatic registration and maintenance of the client contacts to us and preferences.

Questions about the Terms of Service should be sent to us at info@oss-motorsport.com.

 

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