Quote:
Originally Posted by Mike Pearson
I have 1 7/8 straight with 3.5 inch collectors on my 327 275/295 combo running SS/IA. Runs Ok but I think a smaller header would help. 1 3/4 step would most likely be better. Maybe even 1 5/8.
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no maybe definitely! Most run headers that are not one but two pipe sizes too big.