Act 4 is completely the race between Takumi and Daiki once again it is in the leader/chaser style with Daiki choosing to be out in front for the first heat.Has the race progresses we learn just what the two pieces of advice Ryosuke gave Takumi in Act 3 were. First ""don't look back"" - Secondly rev limiting he told Takumi to shift gears at 9000 RPM and not the normal 11,000. The downhill battle seemed to be a bit of a surprise to both racers on Daiki's part it was just how fast both the 86 and Takumi were and on Takumi's side it seemed to be just how much Daiki was able to push him to the edge of his ability's. Has for the race itself the first heat failed to resolve anything with Daiki failing to pass Takumi and in Takumi failing to put any distance between the two of them has for the second heat with Daiki in lead now Takumi was able to end the race when he passed Daiki while using the 86 to it's full potential.
La course débute entre Takumi et Daiki. Durant la première partie de la poursuite, Takumi prend la tête et Daiki joue le rôle du poursuivant. Ce dernier décide de profiter de la situation pour étudier le style de conduite de Takumi. Heureusement, Ryosuke, en fin stratège, a déjà un plan en tête pour permettre au " Project D " de remporter une nouvelle victoire.
バトルは先行後追い形式。１本目は拓海のハチロクが先行、二ノ宮のEK9が後追い。それを知った涼介は拓海に２つの指示を出す。１つ目は「後ろは絶対に振り返るな」。そしてもう１つの指示は・・・。やがてバトルは２本目に突入。先行はEK9、後追いはハチロク。１本目で自分よりも格下と判断した二ノ宮は、一瞬で終わらせようと猛スピードで走る！
Daiki decide la posición que se va a tomar en la batalla. Para asegurar una victoria, Ryosuke da Takumi dos consejos para usar contra EK9 de Daiki, especialmente si el nivel de las técnicas de Daiki son la de semi-profesionales. Todo lo demás depende de la dependencia de la capacidad de conducción de Takumi.
다운힐 배틀에 앞서 료스케가 타쿠미에게 주문한 것은 두 가지. 1차전에서 절대 뒷차를 쳐다보지 말라는 것과 엔진 회전수 최상의 2천을 봉인하라는 것이었다. 그 단순하면서도 선뜻 의도를 파악하기 힘든 주문은 배틀이 시작되면서 진가를 발휘하는데...
与东堂塾较量终於开始了，虽然包括大辉在内，大家都不看好拓海。但86才刚起步，大辉就感受到拓海绝非等闲之辈。而拓海则严守凉介传授两项重要原则，这两项看似简单原则却是拓海迈向胜利之路的关键。
