German car tuning specialists PPI Automotive have released their PPI RAZOR GTR version of the Audi R8, and it will premiere at the Top Marques Monaco 2009. A year ago, PPI introduced their R8 RAZOR edition at the Essen Motor Show which had great success. The new GTR model has all the features the R8 RAZOR did, however PPI aimed at tweaking the R8 to get extra performance gains for the GTR