The JE Pistons Pro Seal head gasket for VW 1.8T 20V (83.8mm bore, 0.055in thickness; ref C4559-051) is a replacement gasket sized to those specifications. It provides the sealing surface between the head and block for combustion and coolant passages during engine repairs. Specify this gasket for Volkswagen 1.8T 20V applications requiring the listed bore, thickness, and reference number.
JE Pro Seal VW 1.8T 20V 83.8mm 0.055in Head Gasket (ref C4559-051)