Frewdenburg-Nok Cylinder Head Seal - This is a circular rubber cam plug at the back of the cylinder head. Itfills the exhaust cam hole where the head and valve cover join.; 1996 Acura Integra, L4 1.8L Eng:B18B1; 1996 Acura Integra, L4 1.8L Eng:B18B1; 1996