1994 1600 X/Flow I need to replace the manifold gaskets as 2&3 cylinder are blowing I will also replace 1&2 at the same time. Checked out Caterham site and they offer an open type gasket which combines 2&3 cylinders into a single opening. Burton's offer is a gasket which gives a separate port for each cylinder, in either 33 or 35 mm. I little confused which is the best option. Also do I need to use a jointing compound if so which is the best type.