Burton full race cylinder head valve sizes 41mm x34mm, this has large chambers cut into the face approx 16cc. This was done by Burtons we believe so to allow flat top or shallow dished pistons to be used.
£225 Located on south coast. Please contact me via email. Thanks

maybe the for sale forum would be a better place for this?

and his email address is?

huh, I dunno

p.mayhead AT virgin.net