Quote: Years ago on my 440 I replaced my 1 ¾ header to a 2 inch on my 440 and it was worth 2 tenths. I think it should dip into the very high 10’s once you get it sorted out. Good luck, and keep us posted.
Hmm maybe I should replace my 1-3/4 headers. Ron
ron, it made next to no difference on my car going from headman 1 3/4 to hooker 1 7/8.
Ron 
