need clarification c5 zo6 243 heads
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Racer
Joined: Aug 2007
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From: Monrovia California
need clarification c5 zo6 243 heads
On the difference between 01-04 c5 zo6 243 heads X casting non x casting and the heads with the "light weight valves" It is said that the X casting heads have better flow but how much? and if a set of 243 std casting is ported does this superceede the X casting or will porting of the x casting heads be better than the std casting ported?
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