Quote:
Originally Posted by mb911
I prefer a 1.625 header sizing for a 3.2 engine and stock is 1.5"
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Ben,
I think the stock 3.2's have 1 5/8" OD primaries and the pre 3.2's like the SC's all have 1 1/2" and this is the reason the stock 3.2 headers out perform SSI's at the top end.