Gettin the cheats via hacking the RAM address to work leds to some of the cutting room floor into the game:
ex. Mitsuyoshi's voice saying "Challenge" in PE, Hornet car in BOTE, and even a cut Select Screen that lets you choose between Normal Mode and Tournament Mode which lets you enter the social security number and changing the setting of the car (ala Daytona GTX Hack of the first game). These are all evidenced in the sound tests if you try to do so, you will hear any of the unused sounds in the game