This car, called Montecarlo BRC, is a GT car which runs in the 2012 Endurance Champions Cup. The car has been developed by BRC Racing Team. This is the racing area of BRC Gas Equipement, a very important italian company, leader in manufacturing and trading automotive LPG and CNG conversion systems.
The car has a 6 liters Audi W12 engine that can produce about 540 BHP and it's powered by a LPG system. In this video you can appreciate the sound of this racing car with some full throttle accelerations and fast fly bys.