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Generation III Internal Engine 1997-2006 LS1 | LS6
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Milling 5.3 heads

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Old 03-02-2006, 08:00 AM
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Default Milling 5.3 heads
I'm replacing my stock 5.3 heads with new ones, how much can I have them shaved before I have issues? This is all on a 5.3 99 truck engine.
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Old 03-02-2006, 08:51 AM
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We've milled heads as much as .045" without a manifold fit issue. I suppose youe could mill more, but you may run into some problems fitting the intake manifold.

Good luck,

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Old 03-02-2006, 10:02 AM
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Thanks Richard,
I remember you giving me good advice before. Thanks man!
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