[quote="andyescos"]
Originally Posted by GUZZLER
Andy, what are the exhaust valves, stainless, sodium filled ??
iirc all cossie exhaust valves are sodium filledI think?, I'll chop one in half and have a look!lol.[/quote
Andy, they need to be sodium filled, many that appear on ebay aren't, or, can't be guaranteed to be, hence their lower prices.