1 5/8 headers

Between header tube sizes, did you notice any changes in efficiency anywhere?
I’ve also noted that a larger header tube normally makes more power but a lot depends on the combo. Often the difference is hard to feel/notice unless your a racer at the track consistently monitoring your runs.

Back to small block talk here for a minute… LOL../

I personally can’t stand the everyday seen design of the 1-5/8 header. For myself, the Summit Racing header has consistently fit best and has the added bonus of a thicker 3/8 flange. Longer bolts needed there FWIW.

On my ‘79 Magnum, I ran with the Hooker Super Comps @ 1-3/4. I haven’t really noticed a difference on the low powered 360. (That’s about to mildly change) But the fitment is much much better than the 1-5/8. Darn shame there equal length headers.