19.8 mm for type 1 engine. Not for molded foot engine and type 4
For engine: 1500cc 1600cc 1800cc 2000cc, 8 valve gasoline For engine: 1500cc 1600cc 1700cc 1900cc diesel, turbo diesel and TDI
For engine 1800cc 16V PLengine 1800cc catalysed RD RG PF - awake10/87Corrado 2000cc 16V 9A