CONCORD, NC - Beginning at the next Winter Cup event and for all WKA events in the future (including Gold Cup),  all Briggs LO206 engines will need to be sealed as shown in the photo.  The sealing wire must go thru one of the carburator attachment bolts and one of the valve cover bolts.  The holes should be a minimum of 5/64" (.078") and should be free of sharp edges that could cut the sealing wire.  Please insure that your engine bolts are drilled before coming to the track. ENGINE.sealing