I kinda want to say yes in my case, when I first put the 470 in my B-Body I used 1 3/4 headers, ran it for a season best was 10.98 in the 1/4, then put on a set of Hooker super comps, and new best of 10.65. I also moved the cam from 104.5 to 103.5, so maybe not entirely the headers