This is an overbore head gasket for 1.8T 20V. This is necessary to use with pistons 82.5 mm to 83.5 mm. This gasket is standard thickness so the compression ratio will not change. It must be replaced every time it is removed.
The overbore head gasket set includes the overbore head gasket as well as all seals for the cylinder head. Not sure if you have everything to build seal up your cylinder head? This is the solution.