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valve seat recommendation

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After discovering leaking exhaust valves, and further inspection I am going to replace all my valves.

What would you guys recommend I do to the valve seats, I am NOT going to lap the valves, but should I plan on getting the seats cut. I have heard the OEM valves should seal right up as long as the seat is not damaged

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The trouble is that the seats are almost certainly worn to some extent, especially if the valves themselves are, and their condition is best examined by a competent machinist. Normally, they don't require a great deal of work, but the best way to assure that the seats are flat and concentric is to grind them back into that condition. Any good machinist will remove only the absolute minimum material required to square them up, but it needs to be done. Trying to run a new $90 Titanium valve on a worn seat is like throwing money in a hole. Even if the seats are nearly perfect, they won't last as long as they should unless they start out properly faced.

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