Heads for 2001?
Bill
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as far as the 853 and 241 head flow, they are nearly the same. all LS heads (with the exception of 243's and LS3/L92 ect...) flow nearly identical. if you swapped a set of 241's in place of 853's, you wouldnt see any difference on the dyno, or track times. its that marginal.
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