[scooberblue]

Hi all

Does anyone no if the bolt on type dumpvalves are ment to have some kind of gasket or O ring??

changed intercooler on my 99 classic an noticed on my forge motorsport dumpvalve it has a ring recessed in it? is there went to be an O ring?
only asking as cant work out how metal on metal could seal air tight an my scoob is giveing symptoms of boost leak.

Many thanks