Reply To: Unleaded Valve Recession – TigersEast AlpinesEast

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February 18, 2005 at 1:10 am #58768

alpine-64

Participant

Apparently VSR becomes an issue above 3000rpm. Alpine heads have hardened seats in them, but if they are original spec they will probably not stand up over prolonged use. I would fit hardened (modern spec) seats if you are doing a head and look at high quality valves SS if the budget allows.