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Generation III Internal Engine 1997-2006 LS1 | LS6
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milling heads: how much causes intake fit problems ?

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Old 06-21-2021 | 05:17 AM
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Frank400
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Default milling heads: how much causes intake fit problems ?
I just rebuilt a L33 5.3, and in the process, I had the heads shaved .015". It did not cause me any problem fitting the intake manifold, but I was wondering how much milling does it take to start causing any problem ?
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Old 06-21-2021 | 09:32 AM
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From: Hurley, VA
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I’ve gone .030 on virgin 243s and no problems.
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Old 06-21-2021 | 09:59 AM
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I think it's less critical with LS plastic intakes than old school aluminum SBC apps due to a "looser fit" on the LS app.
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