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Generation III Internal Engine 1997-2006 LS1 | LS6
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Valve size

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Old 02-28-2004, 08:53 AM
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Default Valve size
What are the largest valves as far as intake and exhaust valves that can be installed on stock valve seats. In the Chevy performance book for LS1 & LS6 says you can go to 2.02 & 1.60 is this information correct.
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Old 02-29-2004, 06:09 PM
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To the best of my knowledge 2.02 & 1.60 is the max for the stock valve seats.
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Old 02-29-2004, 06:32 PM
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Originally Posted by 99 Black Bird T/A
To the best of my knowledge 2.02 & 1.60 is the max for the stock valve seats.
yep,that's as big as you can go.
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