Free 4 Second Boost
Before the loading bar gets full for any track, press and hold the brake button. Hold it until the '3' starts to fade, then release brake and press (hold) accelerate. As '2' starts to fade, release accelerate and press (hold) brake again. Finally, as '1' starts to fade, release brake and press (hold) accelerate until the race starts. If done correctly, this code will start you off with 4 seconds of boost energy on any track in the game, even in multi-player.
Submitted by Stephen_Elliot. 

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