Athena Cut Ring racing head gasket 330212R - bore 83.00mm, thickness 1.00mm, for the BMW B58 (BMW OEM codes 11128654268 / 11128645269). Athena Cut Ring racing head gasket for motorsport and drag racing (race use only, not for street use). Cut Ring technology: separate recessed AISI 304 stainless-steel rings seal around the cylinder bores, so the engine block does not need to be machined for ring seats - no compression loss even with turbo and/or NOS boost above 2 bar. Gasket body in Athena Motorgasket (steel core covered with two layers of asbestos-free aramid fibre) with a silicone bead on the oil and coolant passages. Designed and made in Italy.