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Old 02-08-2019, 02:13 PM   #4
Mike Pearson
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Default Re: Hollow Stem Valves

I would be afraid to run hollow stem valves in my engine. I have had issues with the Manley exhaust valves dropping the head off and killing the engine. Now I change the valves every time I freshen the engine if they have around 75 runs on them. Not worth the risk.
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