1 5/8 headers

Dan the man said
A good friend of mine had 1 3/4" headers with 3" on his '73 dart sport with a built 360. He finally went with 1 5/8" long tube headers from Doug's and a 2 1/2" exhaust system and it ran a lot better. Bigger is not always better.

Ran Appliance Headers 1.5" w/2.5" collectors , 2.5" pipe w/ Walker Turbo mufflers and end out in front of the tires in my B300 72' maxi van fully loaded with ceiling and wall panels, carpeting and rear seats with a 70' 340. Ran GREAT, 5,000lb, high 15's at 90mph.