provide valve actuation in less than 0.15 seconds, with the intake cams being controlled by variable valve timing. The crankcase and cylinder heads are made from an aluminium and silicon alloy, giving the engine a relatively light weight of . Transmission The manual transmission is a six-speed unit that was available either as a GT or CC (Cambiocorsa) using paddle shifters. The GT version utilises a foot-operated clutch, whereas the Cambiocorsa (Italian, meaning "race shift”) is an automated manual transmission. It uses a Formula One-type gearbox, built by Graziano Trasmissioni, with hydraulic operation and electronic management operated by F1-style paddles behind the steering wheel, similar to the system used in Ferrari sports cars. The system allows the driver to choose between four different operating modes: Normal, Sport, Auto and Low Grip. Each of these programs is selected by means of console-mounted buttons, corresponding to different types of operating mode. By switching between the Normal and Sport modes, the driver can select between different electronic stability control settings and, if installed, different active suspension settings. Normal mode provides a more comfortable ride, whereas Sport mode stiffens up the suspension and provides fast gear shifts of around a quarter of a second. Automatic mode electronically handles shifting of the transmission, but allows the driver to rapidly revert to manual using the F1-style paddles. The Low Grip, or Ice mode, allows for smooth starting and gear changes on snow and ice. The transmission is of a transaxle type and located at the rear of the vehicle. It is integrated in with the differential, unlike its predecessor. This gives both the Coupé and Spyder a 48/52% weight distribution between the front and rear axles. Suspension The Maserati Coupé and Spyder both have a light alloy double wishbone suspension. The rear suspension is fitted with a toe-in regulator bar which enhances the precision of the drive train and provides balanced cornering. The front suspension layout incorporates “anti-dive” features to prevent nose-diving when braking. The suspension system is completed by front and rear anti-roll bars. Perhaps the most highly regarded option is a computer-controlled suspension damping system called "Skyhook". This adaptive damping system uses coil-over shock absorbers and a set of six accelerometers that continually monitor the movement of the wheels along with the car's body and transmits this information to a control unit. The vehicle's computer analyses this data and coordinates it with the Cambiocorsa