Epic bump but this thread deserves it.
I realized I haven't cited one of my favorite manga ever.
It is F by Noboru Rokuda.
The author is famous for Dash Keppei ( quite popular in Italy ) but , while it has still comic gags especially in the early volumes, the story is serious in tone and deal with drammatic happenings ( suicides, rapes, epic deaths ...).
The story is centered about Gunma Akagi, the step children of a very powerful man that he greatly despise because think he was the main cause of his mother demise.
With the help of his childhood friend Tomotsu, young but skillful mechanic, he abandon the family and start the career as a professional driver with the goal to achieve the fastest competition in the world ( F1 ) and find finally who is the shadow that is continually ahead of him no matter how fast he run.
If you can find, read it !