HGTE The Ferrari 599 GTB Fiorano HGTE (HGTE being an abbreviation of Handling Gran Turismo Evoluzione) is an upgrade package for the 599 designed to improve the car's handling. It includes a modified set-up with stiffer springs and rear anti-roll bar as well as new calibration settings for the Delphi MagneRide magneto-rheological shock absorbers when the manettino is at its sportier settings. The ride height has also been lowered, resulting in a low centre of gravity. The package also includes optimised tyres featuring a compound that offers improved grip. The car's electronic systems were also changed. The gearbox's shift times were faster in high-performance settings, while new engine software provided improved response. The exhaust was modified to produce a more marked and thrilling sound under hard usage while still delivering the right comfort levels at cruising speed. The exterior and interior were upgraded with more carbon fibre components and the car also included new 20-inch wheels. 599 GTO On 8 April 2010, Ferrari announced official details of the 599 GTO (for Gran Turismo Omologato). The car was a road-legal version of the 599XX track day car and at the time Ferrari claimed that the 599 GTO was their fastest ever road car, able to lap the Fiorano test circuit in 1 minute 24 seconds, one second faster than the Ferrari Enzo Ferrari. Its engine generated a power output of at 8,250 rpm and of torque at 6,500 rpm. The car has the multiple shift program for the gearbox from the 599XX along with the exhaust system. Ferrari claimed that the 599 GTO could accelerate from in under 3.3 seconds and has a top speed of over . At , the 599 GTO weighs almost less than the standard GTB. Production was limited to 599 cars. Of these, approximately 125 were produced for the United States market. Ferrari has produced only two other models that used the GTO designation: the 1962 250 GTO and the 1984 288 GTO with the third being the 599 GTO. Unlike the previous GTOs however, the 599 GTO was not designed for homologation in any racing series. Special variants SA Aperta The roadster variant of the 599, the SA Aperta, was introduced at the 2010 Paris Motor Show as a limited edition in honour of designers Sergio Pininfarina and Andrea Pininfarina, with the "SA" designation standing for both their names. The SA Aperta utilised the higher