Head gasket 1300 black bk450 original gasket

Payen,stamped BK450, original standard composite reinforced gasket used on all large bore engines by Rover including Metro and MG Turbo and is an exceptionally good gasket. Asbestos free with copper type sealing rings. Compressed volume is approx 3.3cc.This original head gasket has now been superseded/replaced by the GUG702560HG which has a different black rubber type O ring fitted on the rocker supply gallery. Many customers prefer this original TAM1521 Payen gasket without the rubber seal which has been proven over time to be superior in competition use, even though these new black type have been known to act as a thermal barrier between head and block which can tend to increase engine temperature, hence why people are still using good copper gaskets,see GEG300.