While getting a Mazda 6 turbo kit is possible, whether you should do it is up for heated debate among the Mazda enthusiast community.
The older Mazda 6’s were not designed to handle a turbo engine. It would need to have a lower compression ratio, a MAP sensor, and a recalibrated ECU along with the cost of getting the turbo kit and installation.
Per Mazda owners that have tried, once they turbo charge their cars, countless other parts need upgrading, and it ends up falling short of their expectations. That said, some drivers are really thrilled with the outcome. That said, you can find a Mazda 6 turbo kit at locations like AutoZone starting at $599.