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Discussion Starter #1
I recently installed dumps on my 68 gto. I have full length headers then about six inches of exhaust then my dumps. Is it harmful to run with the dumps open? I have been told that I will mess up the valves. Any ideas??
 

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64-67 Expert
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No, you have enough exhaust to avoid valve warpage/burning issues. I would worry about carbon monoxide poisioning, though. BTDT, no fun---- and potentially fatal.
 
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