Jun Kitami

Also known as the "Tuner from Hell" (地獄のチューナー), he is the one that originally tuned the Devil Z and also Blackbird as well. He laughs in the face of danger and will gladly take anything past the "safe" 600 hp (450 kW) mark. Unfortunately, the cars he tunes are so powerful that they are extremely difficult to control, hence his reputation as the "Tuner from Hell". He has a big scar on his face, presumably from a past racing incident. Even though he drives a powerful car, he is now only a mechanic.

Compared to other tuners, he has a few strict requirements: for one, he prefers carburetor engines over fuel injection engines since he is old fashioned about cars; even when he accepted the offer to tune the Blackbird just to make a car that can challenge Devil Z, he still complained a lot about it. Incidentally, he owns a bike shop, and was once a pro racer, racing in GT back in his younger days. He prefers to drive older Japanese tuning cars.

(Source: Wikipedia)