The engine then puts out 315-320 hp, and with the exception of the renewed catalytic converters and exhaust silencer, remains absolutely standard on the outside. Unrestrictedly suitable for everyday use, these 40 to 70 additional hp compared to the production version, coupled with the significantly increased agility, help the Carreras from model years 1989 to 1998 to contemporary driving characteristics. This optimization includes a complete engine rebuild.