Hello Cars Racing Fans!
This achievement requires of you to perform 150 Turbo boost during your racing career.
You gain turbo via backwards driving, 2 wheel driving, drifting and doing Air tricks off ramps, then press the X button to do a Turbo boost.
On the Hall of Fame section of the menus you can check how many Turbos you have executed, if going for full Skill Checks you will still need to perform 1850 more.