Why are Most Headers 1-3/4"?
Why are most LS engine Headers 1-3/4" primary? When I was really into the 4th gens all the LS headers were 1-7/8" and people had proof they gained up top and lost nothing down low compared to 1-3/4" yet it seems most the of the LS conversion headers are the smaller primary?
Is it back to where there is no noticeable gain?
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