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Re: Doing a lower intake on GM 3.1/3.4? Please check this
Posted to Technical Discussion Forum on 8/28/2007

As I posted to Ed, I can find no warpage in either the lower intake or the heads. Remember it is the UPPER manifold that cracked on me. Also remember that the warping only shows up across the 1-5 & 2-6 runners after the torquing of the lower intake.

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