Distinctive new Speedline magnesium alloy wheels were shod with slick Pirelli tyres, engines having been sealed to prevent any extra development. Lightweight competition exhausts with just a single outlet pipe freed up a few extra horses, a sintered disc clutch having been the only mechanical change. Relatively few tweaks were made to Pininfarina's original bodywork either, the only tell-tale signs being those Speedline wheels, reinforced tow hooks and electrical kill switches. However, a striking rear aerofoil was introduced from 1997. Perhaps the most far-reaching changes came inside where a roll cage, lightweight sports seats, six-point harnesses and a fire extinguishing system were found. There was also a dash-mounted electrical kill switch, a three-spoke Momo steering wheel and a lightweight battery in a cabin stripped bare of all unnecessary trim. 72 were built new by the factory, 13 of which were right-hand drive while maybe another 100 or so were fitted with Ferrari's after-market pack.