underneath the cabin as in the older front-radiator cars. This also had the side effect of making the doors very wide. The 348 was equipped with a dry-sump oil system to prevent oil starvation at high speeds and during hard cornering. The oil level could only be accurately checked on the dipstick when the engine was running due to this setup. The 348 was fitted with adjustable ride-height suspension and a removable rear sub-frame to speed up the removal of the engine for maintenance. 348 Serie Speciale Between 1992 and 1993, Ferrari made 100 limited edition units of the 348 Serie Speciale of its tb and ts versions. It was only made for the US market. The main technical modifications consisted in a revised engine which produced at 7,200 rpm, a wider rear track (50mm), a free-flow exhaust system, a shorter ratio final drive and Pirelli P Zero tyres. Ferrari indicated a 0–97 km/h acceleration time of 5.3 seconds and a standing ¼ mile of 13.75 seconds. Several modifications were made to the exterior as well: new front spoiler to optimize aerodynamics similar to the F40, new front grille with the chrome prancing horse, bumpers and rocker panels in body colour, engine cover in body colour, modified taillight assembly and new rear grille with the chrome prancing horse. The cars were offered with F40 style sport seats in Connolly leather with the regular seats included as an option. The door panels were also modified and made of leather. Each car was numbered (1 to 100), with a 348 Serie Speciale plaque on the passenger's side door-post. 348 Challenge The Ferrari Challenge was initiated by Ferrari Club Nederland founder and President Hans Hugenholtz and designated for the Ferrari 348; the series debuted in 1993 and included the Italian and European series. The engine used in the participating cars was similar to the road going GT models introduced in the same year with the only noticeable changes being the slick tyres, new body kit, better brake-pads, roll-bar, smaller battery in a different position and seat belts. In 1994 the G-spec engined cars had to be modified with the H-spec cylinder heads and injection system. The cars were mostly modified by dealers by installing factory supplied Challenge kits. The car's final season was in 1995 and was replaced subsequently by the F355 Challenge. 348 GTB, GTS, Spider In late 1993, the 348 was