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Vancouver, WA

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M-TH 9A-5P | F 9A-12P | SA-SU CLOSED

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OEM MAZDASPEED 3/6 K04 TURBO - Exchange Program *One Per Customer*

 
Price: $0.00
Old Mazdaspeed K04 Turbo Exchange program
mazdaspeed-k04-turbo

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Trade-in Your Old Crusty OEM Mazdaspeed 3/6 KO4!

The original Mazdaspeed K04 turbocharger on the 2.3L DISI MZR engine is prone to fail, especially when you start shoving that extra air through it to make more power. Fast forward to today, and the OEM Mazdaspeed K04 Turbo is now at least a decade old. With most Mazdaspeeds experiencing their 2nd, 3rd, or even 4th owners, the question is not whether your KO4 turbo will need to be upgraded but when - even if it has been previously rebuilt.

That's where the CorkSport Mazdaspeed 3/6 K04 Turbo trade-in program comes in. It has never been easier to upgrade your turbo to one that will successfully support your power goals. Don't settle on another rebuilt KO4; instead, UPGRADE to a more powerful and reliable CorkSport Turbo today.

The Choices Are Simple

1.) Receive a $150 rebate towards a new CorkSport CST4, CST5, or CST6 purchase! -or-

If You Already Upgraded Your Turbo, That is OK!

We value your commitment to performance and have given you two additional options!

2.) We will give you $100 in CS points -or-

3.) Receive a 7th Gear Membership - FREE SHIPPING for a year in the lower 48 states and discounted shipping everywhere else!

It's our way of saying thank you for CHOOSING CorkSport, SUPPORTING the Community, and HELPING YOU BUILD YOUR RIDE!

*CorkSport Points & 7th Rear Memberships require a FREE Registered CorkSport Account.


The CorkSport Advantage

Mazdaspeeds OEM Turbo Exchange Program

How The Exchange Program Works

  1. Purchase A new CorkSport Turbo (CST4, CST5 or CST6) from CorkSport.com.
  2. Add this product *OEM MAZDASPEED 3/6 K04 TURBO - Exchange Program* to your shopping cart and complete the checkout process.
  3. We will ship your new CorkSport Turbo to you.
  4. Ship back your old OEM Mazda KO4 to us within 60 days - with TRACKING - along with your name and order number inside the box.
  5. We review the turbo to ensure that it is a rebuildable OEM Mazdaspeed 3/6 K04 Turbo - See Terms & Conditions.
  6. Once we validate it's a genuine rebuildable OEM Mazdaspeed K04, we will issue a rebate or CS Points.

*Steps 1 & 3 do NOT apply if you are exchanging for CorkSport Points or a 7th Gear Membership.

*Rebates & CorkSport Points are NOT transferable.



mazdaspeed 3 k04 turbo cst4 exchange replacement new old

Upgraded CST4 vs OEM KO4

There is a BIG difference between replacing a bad turbo and upgrading Mazdaspeed K04 to a more efficient one for more power.

If you want to replace your KO4 turbo, go with OEM and just plug and play. You’re good to go; wash your hands and get on with your life. This will have your car up and running pretty quickly. However, your maximum power output will be limited, and you will eventually have the same problem – the Mazdaspeed KO4 turbo will fail.

The upgraded CorkSport CST4 Mazdaspeed turbo continues to prove itself as one of the best bolt-on performance options coupled with the needed reliability to withstand the additional demands of chasing 400 WHP – something the KO4 cannot accomplish.

Note: An upgraded turbo will require HPFP Internals and a tune.



k04 turbo compared to the CorkSport CST4, CST5, CST6

The Mazdaspeed K04 Turbo Limitation

The CST4 Turbo for the Mazdaspeed 3 is a drop-in UPGRADE from the ground up, and by no means is it an apples-to-apples comparison with the asthmatic Mazdaspeed K04 turbo.

  • The K04 turbo uses restrictive housings that cannot keep up at higher RPMs, and especially at higher boost levels. You can feel this as your stock turbo “runs out of steam” up above ~5200 RPM.
  • The OEM K04 uses a 45mm inducer; 56.25mm exducer cast compressor wheel, while the CST4 uses a 50.5mm inducer and 68.1mm exducer forged billet compressor wheel.
  • On the turbine side, the OEM K04 turbo uses a 50.1mm inducer and a 44.5mm exducer 12-blade cast wheel. The CST4 turbo uses a 56.2mm inducer and 49mm exducer high-flow 9-blade design.
  • Again, the CST4 outshines the K04 with the turbine inducer being 12% larger and the exducer 10% larger. The 9-blade design has two key benefits: more peak exhaust flow as there is less material in the way of flow, and 21% lighter for a faster spool time.



Better performance with a new Mazdaspeed Turbo

Three Turbo Options To Exceed Your Power Goals

Exchanging your Mazdaspeed K04 for a CorkSport Turbo gives you multiple options, including the ability to go with an external wastegate.

With three turbo sizes to choose from, you have the opportunity to add the additional performance you need to meet or exceed your power goals. Potential power gains, +400WHP (CST4), +500WHP (CST5),or +600WHP (CST6).



Better performance with a new Mazdaspeed Turbo

Before You Ship Your OEM Mazdaspeed 3/6 KO4

  • Please read the Terms & Conditions.
  • Please validate that you indeed have an eligible OEM Mazdaspeed KO4 Turbo; KO422-881 or KO422-882.
  • You are required to submit your name and CorkSport order number inside the box along with your OEM Mazdaspeed KO4 core.
  • Exchange Program NOT available for Regional Dealers, Shops, or Mazda Dealers.
  • Customers are limited to one OEM Mazdaspeed 3/6 KO4 Exchange Only.
  • OEM Mazda CX7 KO4s are NOT eligible for exchange or CS points.


Product Advisory Note
  • Customers are limited to one OEM Mazdaspeed 3/6 KO4 exchange towards a New CST4, 5 or 6 turbo, or $100 in CorkSport Points.
  • Rebate is available towards a new CorkSport Turbo Purchases Only.
  • Return must be a genuine OEM Rebuildable Mazdaspeed 3/6 K04 Turbo
  • Shipping costs are the sole responsibility of the customer, including any associated fees regarding transportation, transit insurance, taxes, and duties for the K04 Turbo core.
  • Exchange Program NOT available for Regional Dealers, Shops, or Mazda Dealers.
  • Non-Mazdaspeed OEM KO4 Turbos, Mazdaspeed KO4 turbos with cracked or broken exhaust/compressor housings or missing components, OEM Mazda CX7 KO4s, or subsequent OEM Mazdaspeed KO4 Turbos DO NOT qualify for a rebate or CS Points and will be returned at the owner's expense. Partial rebates or CS points are NOT available.

TERMS & CONDITIONS

Exchange Program:

  • Customers are limited to one OEM Mazdaspeed 3/6 KO4 exchange towards a New CST4, 5 or 6 turbo, or $100 in CorkSport Points.
  • OEM Mazda CX7 KO4s are NOT eligible for exchange or CorkSport points.
  • Rebate is available towards a new CorkSport Turbo Purchases Only.
  • Rebates and CorkSport Points are NOT transferable.
  • Exchange Program NOT available for Regional Dealers, Shops, or Mazda Dealers.

Core Requirements:

  • All cores submitted for a rebate or CorkSport Points must be original equipment manufacturer (OEM) Mazdaspeed 3 or Mazdaspeed 6 KO4 Turbos; KO422-881 or KO422-882.
  • Cores for OEM K04 turbos must be in 100% rebuildable condition to be considered eligible for a rebate or CS Points.
  • CorkSport will NOT accept any cores with missing exhaust/compressor housings, damaged/broken studs, bolts, or stripped threads.
  • CorkSport will NOT accept any cores with cracked, broken, or damaged exhaust/compressor housings.
  • CorkSport will NOT accept any cores with missing components.
  • CorkSport will NOT accept any eBay Beijing Whirlyboi KayOhForz or similar KO4 replacement brands for a rebate or CorkSport Points.
  • Cores NOT meeting these criteria will be returned at the owner's expense.
  • Partial rebates or CS points are NOT available.

Packaging Requirements:

  • Bubble wrap and/or heavy shipping paper must be used for protection during shipping.
  • Do NOT use packing peanuts.
  • Please bag your turbo if it is oily.
  • Customers are responsible if goods arrive damaged - due to poor packaging, damage incurred during transit, etc.

Return Shipping & Tracking:

  • Ship back your old OEM Mazda KO4 to us with TRACKING - along with your name and order number inside the box
  • Core returns must be associated with an order number for tracking - CS will not accept/process random KO4 deliveries.
  • Customers are responsible for all return shipping costs and import fees/taxes associated with or incurred during the return process.
  • Customers are required to provide tracking of their core return. CorkSport is not responsible for lost or delayed shipments.
  • Customers are required to provide tracking of their core return via email.

Timeline and Shipping:

  • New Turbo Rebates: Cores must be shipped to CorkSport Mazda Performance within the 60 days following your new CorkSport Turbo shipment.
  • CorkSport Points Exchange: Cores must be shipped to CorkSport Mazda Performance within the 60 days following your order creation.
  • CorkSport Points require a FREE Registered CorkSport Account.
  • Failure to meet your transaction-specific deadline will result in forfeiture of the rebate or CS Points, depending on the exchange you choose.

Note: CorkSport reserves the right to amend or modify this exchange policy as needed without prior notice.

I‘m extremely grateful that the CorkSport Team is offering this program! Now I can turn what was going to go into the landfill into purchasing power for their products.

After the gentleman who normally purchases these turbo’s online banned me, then mocked me for reporting hate posts to moderation on the Facebook page he owns, I was about to throw this (OEM Mazdaspeed KO4) into the trash.

Thank you, CorkSport, for being such a great company and for supporting the Mazda community with such a wide array of well-engineered and thought-out products.

Looking forward to buying more CorkSport products!
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