1 3/4" Headers Verses 1 7/8" on a Healthy 408....Is There a Big Difference??

Brooks James said

Seriously another 1/8 inch “PROBABLY “ isn’t going to give you much in the seat of the pants. I say probably as a disclaimer because there is no way everyone will agree with me. I’ve seen it too many times here.
Not to mention cost and frig factor
I say spend 3-400 bucks for a 150 shot of gas and go into the 9”s
Yes I already I’m going to get a lot of s..t
From saying this

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I’ve seen it way too many times in the dyno. A bigger header makes a difference IF the cam timing is correct for it. You have to let the header do what it’s designed to do, and certain cam timing events make the header almost a non factor.


Fix the cam timing and the bigger header wins every time. Just because someone on here puts a header on their car and it doesn’t run quicker or slows down means little to me. You ASSume they all can tune. Tune an engine. Tune a chassis. I know some guys that can’t run a timing light.