As you knoe my beloved Xantia is having major surgery atm just when im broke! Anyway the heads coming off and I wil at leats need new vales for it, but where od you get them? ECP and GSF dont list them and Im not brave enuogh to ring citroen yet!
Tim, hiflow heads do them for the mi for £7 and £9 each so may be worth a try incase the valves are the same!! failing that matey a local engine reconditioners should be able to help you out???