This is the latest Audi R8-based PPI Razor GTR powered by stock 4.2-liter V8, producing 580hp. It has a specially engineered supercharger and a ram-charged sport air filter system + a high performance stainless steel exhaust. With the main focus on optimizing the power-to-weight ratio, R8 just lost 521 lbs that helps to increase torque to 600Nm, shooting to 60mph at 3.7 and goes to the max 200mph. More pictures after the break.

[via Flylyf]