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Generation III Internal Engine 1997-2006 LS1 | LS6
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Milled #243 heads

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Old Jun 20, 2013 | 05:00 PM
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Default Milled #243 heads
I have a set of #243 heads for my ls1 and I was wondering how much I can mill these heads and how much HP gain il see with milled 243 heads
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Old Jun 20, 2013 | 05:08 PM
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Depends on the cam your going to run, stock pistons? Or aftermarket?
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Old Jun 20, 2013 | 06:01 PM
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Stock pistons and still deciding on a cam. Maybe a tsp 228r or just go for the ms3 or ms4
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Old Jun 20, 2013 | 06:40 PM
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Ms3 and 4 cam are big and you will be limited on how far you can mill before needing valve reliefs..

I would call TSP since they have put together every combo possible using those cams and ls6 heads..
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