I just like to point out something about the NOTES portion for authenticity's sake. Kei didn't choose to detune the Supra. He had the deal with Yamamoto to master the 800hp Monster Supra and beat the Z. After experiencing a gruesome defeat and the Supra dying, he sees himself unworthy to pilot it ever again and leaves it to the tuners to decide its fate. The tuners detuned it, gave it back to Kei and repainted it to Silver like that of his father's XX Celica, which made Kei break into tears. They said that 400hp is decent enough for C1 with Kei's skills.