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Mazda 3 MT Upgraded Gears 3rd/4th - 2014-2018

List price:$1,999.99  
Price: $1,749.99
You save: $250.00 (13%)
Price in points: What are Points?1750 points
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Mazda 3 performance upgraded gears manual transmission
AXM-6-420-10
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Enjoy the power and performance of CorkSport's manual transmission Mazda upgrade gears designed for racing. We rigorously tested these gears in our race car and test mule for the 2022 TC America racing tour and passed with flying colors through the entire circuit. You can have confidence in CorkSport's best Mazda 3 gear set that provides optimal performance for your racing needs.

Big power means nothing if you keep breaking transmissions. If you relate to this, you might need stronger gears. During our TC America Racecar development program, we discovered that the 3rd and 4th gears in the factory manual transmission just aren’t capable of handling the extra forces that boost and sticky tires bring to the party. CorkSport’s upgraded gears are constructed of SAE 9310 Steel and Shot Peened for extra strength to allow you to keep racing with no worries. These gears were developed for road racing, but are perfectly suited for the Drag Strip or a High Powered street application.

Read The BlogRacing Quality Mazda 3 Performance Upgrade Gears for 3rd & 4th


The CorkSport Advantage

Mazda 3 TC Racecar performance parts

Race Tested:

We have been running this upgraded gear set for the entire 2022 TC America race season with great reliability. Our TC racing car test mule is consistently producing 317hp, 355ft-lbs of torque thanks to our Skyactiv Turbo Kit and is wearing meaty Pirelli P-Zero Racing Slicks. We have confidence that these gears can handle the power output and forces produced by anything on the market today.



Mazda 3 performance parts transmission

Materials and Design:

CorkSport’s upgraded gears are constructed of high-quality SAE 9310 Steel and Shot Peened for extra durability. Our gears remain helical and keep the factory gear ratios to ensure fitment into street-driven applications with OEM synchros, but are still able to utilize the added strength of the material upgrade.



Product Advisory Note
  • Expect increased NVH (Noise, Vibration, and Harshness) and gear whine when 3rd or 4th gears are engaged
  • Professional installation and tools highly recommended
  • No Returns Accepted

Additional Features

  • Vehicle Fitment: 2014-2018 Mazda 3 MT, 2014-2021 Mazda 6 MT , 2016+ CX3 MT Years. Manual Transmission only
  • Developed in America: Designed, tested, and validated in Vancouver, Washington, in the Pacific Northwest.
  • CorkSport Service and Support: Receive full-color installation instructions, all of the needed installation hardware, and knowledgeable telephone installation support.


How To Install the Mazda 3 Upgrade Gears

It will take you Approx. 6+ hour to install.

6 hour Install Time

6+ Hour Install Time

Difficulty: 5/5

5/5 Difficulty

No Warranty

No Warranty

No CEL

No CEL

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Mazda performance parts financing is available with CorkSport

Looking to finance your parts purchase and want to get 6 months NO interest on any purchase over $199? Click on the image above for more details.

Vehicle Fitments by Model & Year

Mazda 3 2014-2018

  • 2014 Mazda 3 Manual
  • 2015 Mazda 3 Manual
  • 2016 Mazda 3 Manual
  • 2017 Mazda 3 Manual
  • 2018 Mazda 3 Manual

Mazda 6 2016-2021

  • Mazda 6 2016 Manual
  • Mazda 6 2017 Manual
  • Mazda 6 2018 Manual
  • Mazda 6 2019 Manual
  • Mazda 6 2020 Manual
  • Mazda 6 2021 Manual

Mazda CX-3 2016-2023+

  • 2016 CX3 Manual
  • 2017 CX3 Manual
  • 2018 CX3 Manual
  • 2019 CX3 Manual
  • 2020 CX3 Manual
  • 2021 CX3 Manual
  • 2022 CX3 Manual
  • 2023 CX3 Manual