ATHENA BMW 3.0 N54B30 N55B30 COOPER RING CYLINDER HEAD GASKET 86X1.5MM 330074R 

Athena Racing 330 series Cooper Ring cylinder head gasket set.
For specific high horsepower applications, engine performance can be significantly improved by using Athena Cooper Ring gaskets, that are supplied with INOX steel ring. This technology outperforms conventional fire ring solutions.
Cooper Rings are oversize (also fits for oversize bores).
Part number: 330074R
Gasket thickness: 1.50mm
Bore size: 86.00mm