The HSCC Classic Formula 3 Championship is open to genuine Formula 3 racing cars originally built and raced between 1/1/1971 and 31/12/1980.

Cars may use 2 litre or 1600cc engines used in period, fitted with air restrictors. Only very minor alterations from original specifications are permitted. All cars use the same type and compound of Avon control tyres. Ralt RT3s are specifically not eligible.

There is also an invitation class open to Formula Ford 2000 cars built prior to 31/12/1979.

All cars must have current FIA or HSCC Vehicle Identity Forms.