As header states folks where is best to get these items, I e-mailed GSF but got this reply:- Hi Of the parts you have enquired about we can only supply the oil filter as we have no listings of the timing chain guide and the tensioner rail and bolt the numbers you supplied come up but does not cross over to any GSF part numbers unfortunately. The part number for the oil filter is HU932/6N @ 6.25 plus vat Many Thanks Davey Bansal GSF Heathrow The engine is OBD2 and I am not currently in a financial position to lash more money out on the full chains yet but she has got a little noise coming a