INTRODUCTION Twin turbo is an already known solution with a lot of applications due to advantages like decreasing turbo-lag phenomenon, better tuning between engine and compressor and more internal layout options in the engine compartment. The most popular twin turbo engine is probably the V6, but any other 6 cylinders engines could be turbocharged using twin turbo systems for a lot of applications. In addition, it is exist a clear trend to increase the use of twin turbo system in the area of V8 spark ignition and diesel engines. A typical layout of a twin turbocharger V6 engine is shown in Figure 1. Basically, the turbocharged topologies consist in two parallel systems in which burned gases from each group of 3 cylinders are driving one turbine. The pressurized air from both compressors is adding up in a common manifold and passed through an intercooler and then fed into intake manifold. Load control is realized by classical throttle operation. Boost pressure from each compressor is regulated by a waste-gate, which may be built-in or separated from the turbine housing. Starting on this cheaper twin turbo sche