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Generation III Internal Engine
Stage III heads

Generation III Internal Engine 1997-2006 LS1 | LS6

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Stage III heads

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Feb 24, 2005 | 12:02 AM

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Stage III heads

I was thinking about just buying Stage 3 heads now since my end goal is 408, or 427 ci engine. My question is will it hurt my current engine of stock ci's? I will need them eventually so I would prefer to buy them now but if it will hurt my performance I won't.

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Feb 24, 2005 | 09:02 AM

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They may not fit. Stage 3's in general have larger valves and opened up chambers for the larger bore.

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Feb 24, 2005 | 09:07 AM

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Quote:

Originally Posted by 2c5s

They may not fit. Stage 3's in general have larger valves and opened up chambers for the larger bore.

You can get the stage 2R's which are basically the stage 3 but for the smaller bore. They can easily be made into stage 3's later. (I think)

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Feb 24, 2005 | 09:08 AM

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Quote:

Originally Posted by 2c5s

They may not fit. Stage 3's in general have larger valves and opened up chambers for the larger bore.

http://www.motorsporttech.com/fbody_engine01.asp

See "Stage 2R Cylinder Heads" in the link above.....

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