CST6 Turbo Combo - w/ Exhaust Manifold & Dumptube + Block Off Plate

About The CST6 + Exhaust Manifold Combo

Save with the ultimate Turbo Combo Kit for your Mazdaspeed. We've combined two of our best products, the CST6 & the Exhaust Manifold, including a block off plate and dumptube, to give the best in CorkSport performance for your Mazdaspeed!

For those aiming to push their Mazdaspeed beyond 600 WHP, this exclusive package is a must-have for boost enthusiasts. Our comprehensive Mazdaspeed turbo kit includes a dumptube for your exhaust manifold and a block-off plate to seal any unused external wastegate ports in your manifold or turbine housing. Enjoy significant cost savings with this offer, and get ready to boost to your heart's content. Your wallet and your grin will thank us later!

CorkSport CST6 Turbo

CorkSport CST6 Front better than the K04 BNR S5

The CorkSport CST6 turbo is the ultimate turbo we have to offer for your Mazdaspeed! This turbocharger offers built block power and fast spool times that will help push you to 600whp and hit 20psi by 3800-3900rpm. This turbo is designed to get you revved up; whether you like a relaxed tune or want to push it to 30+ psi using auxiliary fueling, this turbo will get you there. Whether you want a relaxed, stock block-safe tune or aim to push it to 30+psi for built blocks with auxiliary fueling, this turbo is designed to impress. It's the ultimate K04 turbo upgrade for your Mazdaspeed.

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About The CST6

If you’re looking for big power for your Mazdaspeed without the headache of non-OE style fitment, then you have come to the right place. The CorkSport CST6 owns the Mazdaspeed Stock Flange Turbine Record at 684whp all while using stock flange components.

We've crafted a high-performance turbocharger that you, the Mazdaspeed enthusiasts, will love. The CST6 responds quickly, supports over 600WHP, and works seamlessly with stock-style turbine flanges. It features a Garrett CHRA with a Ceramic Dual Ball Bearing Cartridge, enhancing response and durability for high-boost applications. In testing, the CST6 has been pushed to 38psi, maxing out an auxiliary fuel system flowing 40gph of methanol.

The CST6 is equipped with a 0.82 A/R turbine and a 4” anti-surge compressor cover, perfectly balancing the turbine and compressor wheel sizes. This setup delivers around 20psi by 3800-3900 RPM and supports top-end power up to 8000 RPM. The result is a thrilling and powerful performance across the entire power curve.

The CST6 Turbo is available in Externally Wastegated (EWG) setup only and does include the necessary EWG installation elbow pipe & V-band clamp. We also offer a direct fit dump tube!

The included CorkSport 4.5Bar MAP sensor is designed to offer accurate and near-instantaneous readings to ensure your car is staying safe. Boost pressure readings are accurate all the way out around 48psi while response time for both pressure and temperature is mere 2 milliseconds. The CS 4.5Bar MAP Sensor uses a custom injection molded body that mimics the OEM MAP sensor. This means a quick 15-30 minute plug-and-play install with no need for custom wiring or expensive adapter harnesses.

Mazdaspeed 3 Big Turbo the CST6 k04 bnr precision

High Performance Focused

he CorkSport CST6 is built to deliver serious power without needing a custom turbine flange. It can crank out mid-500WHP on a "moderate" 26-28psi, and if you push it to the limit, it can hit a whopping 684WHP at 38-40psi. But don't worry about spool time—this beast hits 20psi by just 3800-3900 RPM!

Optimized Turbine Housing

the CST6 rocks a 0.82 A/R turbine housing in an EWG setup, featuring an optimized scroll design to squeeze every bit of power from the stock Mazda flange. This setup delivers impressive spool characteristics for a turbo of this size without sacrificing maximum power. And the best part? It bolts right in place of your OEM turbo!

Anti-Surge Compressor Cover

Pairing with the high-performance turbine housing, the CST6 features a 4” inlet compressor cover equipped with anti-surge ports. The 4” inlet eliminates any choke points when used with a 3.5” or 4” intake, while the anti-surge ports expand the compressor map width for peak performance. Best of all, it maintains OEM fitment, so no modifications to your existing parts are needed.

Ball Bearing CHRA

The CST6 is equipped with a robust dual ceramic ball bearing Garrett CHRA. We chose ball bearings to boost durability, especially given the large wheels and high boost levels that put extra strain on the CHRA. Plus, we've specially modified the Garrett CHRA to fit seamlessly with the OEM Mazda oil drain line, making your installation a breeze.

Proven Wheel Combo

The CST6 turbo setup is a boost enthusiast dream come true, featuring the reliable Garrett GTX3576R. This beast boasts an 11-blade billet compressor wheel pushing 64 lb/min and a 10-blade turbine wheel. The result? Amazing spool times, hitting 20psi at just 3800-3900 RPM. Perfect for those who crave high performance for their Mazdaspeed

Billet Compressor:

Utilizing the Gen1 GTX76 billet compressor wheel, the CST6 can efficiently support 64 lbs/min flowrate and boost pressures to 40psi.

High Flow Turbine

Paired with the compressor wheel is a Garrett GT35 turbine wheel. This wheel uses a 10-blade design which reduces overall rotating mass and thus improves response and spool.

Designed for EWG

In testing it became clear that an internal wastegate setup simply wouldn’t cut it for the CST6. So we perfected the CST6 with an EWG housing for the best in boost control. Each CST6 comes with the elbow and clamp to fit a Tial 44mm (or equivalent) wastegate. If you want to further simplify your install, be sure to pick up the optional CS direct fit dumptube so no fab is needed on your CST6 install!

Hardware and Gaskets Included

Each CST6 comes with new gaskets, turbine studs, turbine nuts, new banjo bolts with crush washers, and the coolant lines you need for installation.

Mazdaspeed Exhaust Manifold

For the Mazdaspeed enthusiast, the CST6 turbocharger offers unparalleled performance, reliability, and sound. When paired with a high-flow exhaust manifold, the CST6 optimizes airflow, ensuring your turbo operates at its best. Designed to fit seamlessly with the stock Mazda flange, this setup allows for easy switching to different flange styles without needing to replace the entire unit. Made from durable 304 stainless steel, the manifold features no welded flanges or connections, reducing the risk of cracking. Each flange surface is precision-machined for perfect flatness. Elevate your Mazdaspeed experience with the CST6 turbocharger with Exhaust Manifold and enjoy CorkSport performance at its peak!

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CorkSport Modular Exhaust Manifold for Mazdaspeed 3 & Mazdaspeed 6

Power:

30-40whp gains over an XS Power V3 and faster spooling. This is the result of a well designed, high flow exhaust manifold. Power over the entire curve results in better drive ability and faster times at the track.

CAD Designed:

Each component is CAD designed and validated on car for fitment and performance. Three components: the manifold, flange elbow, and dumptube come together to create the most complete exhaust manifold kit available.

Runner Design:

The CorkSport exhaust manifold design provides improved airflow from its smooth radius bends. The CS manifold accomplishes this through its tubular design with 1.59-inch diameter runners and smooth bends as opposed to the sharp bends of the OEM and other aftermarket manifolds. This is a superior improvement to the 1.41-inch runners in the XS Power V3. These efficiencies provide a smooth flow of air resulting in improved performance of your Mazdaspeed!

High Flow:

Using a combination of computer-aided flow simulations and flow bench testing, the CorkSport Exhaust Manifold was optimized to enhance peak flow capacity and overall performance. Flow bench testing at 28 inches of H2O demonstrated an average CFM flow improvement of 45% over OEM and 33% over the XS Power V3.

Bullet Collector:

The CorkSport manifold features a shallow 16-degree angle collector with a defined "bullet" point to enhance flow efficiency into the turbine, boosting peak flow and power. With individual runner lengths ranging from 10.50 to 12.40 inches, it improves flow balance while preserving the distinctive Mazdaspeed exhaust note.

Dumptube:

With the unique location of the EWG we developed a custom fit 2-piece dumptube that makes installation easy. You can add this optional dumptube and avoid the high cost and time to have a custom dumptube fabricated. Designed to work with most typical downpipe and turbo setups.

Manufacturing:

With the high heat and pressure demands put on the exhaust manifold; material and strength are critical. The CorkSport manifold is investment cast from 304 stainless steel with 0.50in (13mm) thick flanges and 0.20in (5mm) thick runner walls. This manifold is beefy so it can handle the high power high heat reliably.

Block Off Plate

The CorkSport block off valve is an ideal solution for eliminating unnecessary EWG ports or Turbo housing opening. Whether you've chosen the IWG or EWG, the plate will close the necessary opening for the best performance for your Mazdaspeed.

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About The Block Off Plate

Function Focused:

The CorkSport EWG Cap will easily block off any unneeded or unused external wastegate port in your manifold or turbine housing. We took all critical design dimensions directly from a Tial MV-R 44mm wastegate so you can be confident you will have a perfect fit with no leaks.

Materials & Manufacturing:

Each CS EWG block off is precision machined from 303 stainless steel for great fitment, corrosion resistance, and strength. Included with every cap is a stainless steel v-band clamp so install is simple and you don’t need to go hunting for the correct clamp!

Auxiliary fueling is required for the peak power operation of the CST6.
EWG flanges designed for Tial 44mm or equivalent external wastegates.
Some downpipes may need relocation of the primary O2 sensor location for manifold installation.
Some downpipes may not work with the optional dump tube.
Provided firewall heat shield does not work with Mazdaspeed 6 and RHD Mazdaspeed 3 Models
Compatible with TMIC with modification to the rear mounting bracket and without the use of the manifold-mounted EWG.
EWG cap fits on turbo and manifold EWG ports. Ensure cap is centered on wastegate port and tighten supplied clamp to 8-12ft-lbs.
CST6 Warranty is 1-year, while the Exhaust Manifold carries a 2-year warranty

Compatible with: 2006-2013 DISI MZR found in the Mazdaspeed 3, Mazdaspeed 6
Designed in America: Designed 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.