Fair enough if you have the tools yourself to pull out and press in new guides and to recut valve seats. When I was looking at it and was talking to head shop their position was that there will be some wear on valve stems as well so they said if using off the shelf valve guides than best to use new valves too. But if they supply valve guides they could do tailored bore size to suit old valves. Not sure how much truth is in it, I never proceeded as I found pair of heads with 2000 miles on them for less than it would have cost to reburbish 1 head.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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