Mazdaspeed Turbo Upgrade Kits

Boost your Mazdaspeed to 400+, 500+, or 600+ WHP, or simply looking to provide a more reliable factory-fit turbo, you've come to the right place. CorkSport Turbos are designed to improve power, performance, and longevity with three time-tested turbos ( CST4, CST5, and CST6), empowering thousands of Mazdaspeed enthusiasts with a significant boost in power and performance.

Our turbos provide drop-in performance that directly replaces the Mazdaspeed OEM K04 Turbo. Although the K04 Turbo provided us with 263 WHP and 280lbs of torque, it was never designed to deliver the performance most drivers demand of the Mazdaspeed. It was inherently flawed with a small turbine that provides a quick launch but just dies at the top end. With this in mind, we set out to develop a solution that fits like OEM and provides reliability and performance without needing a lot of modifications to Speed to work. Our solution was the CST4 supporting +400WHP followed by our CST5 and CST6!

CorkSport simplifies the upgrade process with its Mazdaspeed OEM K04 Exchange program. Trade your Mazdaspeed OEM K04 Turbo in and receive a $150 rebate on the turbo of your choice. Simply follow the instructions on our exchange program page, and you'll soon enjoy the benefits of our performance turbos.