Understanding why people sometimes think that what they have isn?t enough despite the evidence suggesting otherwise is a very tricky thing to figure out. But to each his own, and you just have to shrug your shoulders and accept it.

This particular Mercedes C63 AMG is a perfect example of that. Already packing an impressive 451 horsepower, the owner of this C63 AMG, Keith Brantley, thought that he could get in touch with a tuning company and squeeze a little more juice on his high-powered Mercedes. So, he hooked up with Modern Horsepower and gave them specific instructions: give me more ponies to play with.[...]

Source: topspeed Tuning