The Fiat 500 is a widely appreciated model in the international markets, although it might not be exactly highly impressive or remarkable. The 500 is also not an awesome performance model even in its Abarth version. However, the modified Fiat 500 is a completely different car and is a treat for the auto enthusiasts, both in terms of looks and power. Giannini, a tuning firm based in Italy is responsible for offering this wickedly awesome racer form of the Fiat 500. This little beast is called the 350 GP4, and the name as we can figure out suggests the power it offers. Yes, the Fiat 500 350 GP4 should be belting out a max power output of 350 hp, and for the Fiat 500, it is massive. What more? The hammering power gets transmitted to all four wheels of the car making it more stable, planted on the roads and offer better traction.