sentences:  During engine development Ferrari started experimenting with a "Comprex" pressure wave supercharger, supplied by a swiss company; this car version was initially called 126BBC from the name of Brown Boveri Comprex and later named 126CX.The system was praised by drivers for driving like a naturally aspirated engine but having an extended power range, thus eliminating the notorious lag of the turbocharger.However the system was rather tall in the car and there could be some mixing of exhaust and intake gas so the team opted for the fitment of twin KKK turbochargers producing around in qualifying trim, detuned to in race trim.