60 millisecond shift times. A new traction control system combined the F1-Trac traction from the 599 GTB and stability control with the E-Diff electronic differential. The Ferrari 430 Scuderia accelerates from 0- in 3.6 seconds, with a top speed of . Scuderia Spider 16M To commemorate Ferrari's 16th victory in the Formula 1 Constructor's World Championship in 2008, Ferrari unveiled the Scuderia Spider 16M at World Finals in Mugello. It is a convertible version of the 430 Scuderia. The engine is rated at at 8,500 rpm and of torque at 5,250 rpm. The car has a dry weight of ( lighter than the F430 Spider) and a kerb weight of . The chassis was stiffened to cope with the extra performance available and the car featured many carbon fibre parts and weight saving measures as standard such as lightened front and rear bumpers. Unique 5-spoke forged wheels were specifically produced for the 16M and helped to considerably reduce unsprung weight with larger front brakes and calipers added for extra stopping power (also featured on 430 Scuderia). It accelerates from 0- in 3.7 seconds, with a top speed of . 499 cars were produced beginning early 2009 and all were pre-sold to select clients. Special editions F430 Spider Bio Fuel A version of the F430 Spider that runs on ethanol, called the F430 Spider Bio Fuel, was on display at the 2008 Detroit Auto Show. It had the same 4.3 litre V8 engine as the standard car, producing , with a 4% increase in torque and with 5% less carbon dioxide emissions than the standard F430 Spider. SP1 The F430-based Ferrari SP1 (Special Project Number 1), was the first one-off special produced by the Ferrari Portfolio Coachbuilding Programme, also known as the Special Projects Programme (SP). The body was designed by former Pininfarina designer Leonardo Fioravanti, at the behest of Junichiro Hiramatsu, a Japanese businessman who was the former president of the Ferrari Club of Japan and an avid collector; he had admired Fioravanti's 1998 F100 prototype. Racing F430 Challenge The F430 Challenge is the track version of the F430, designed for the Ferrari Challenge. The engine remained untouched but the vehicle's weight was reduced, resulting in a top speed of . The production model was unveiled at the Los Angeles Auto Show in January 2005. F430 GTC Built since 2006 by Ferrari Corse Clienti department in collaboration with Michelotto Automobili,