If you call Keith at BME he will send you out some new stainless head bolts. You just need to check and see if you have the 5mm or 6mm bolts. Or you can use the 10/32 size from the hardware store and I think it will replace the 5mm size or just take it with you and get some that fit. It would be a bad day if you lost a head in flight!!! My aluminum bolts were the blue color that I had to replace. The stainless ones are not colored. Also check to see if you have gaskets on the reed valve block or sylicone. Keith said I should replace the sylicone with gaskets and he sent me some.

Steve