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I posted this question in the 73-79 section, but this is where I should have put it in the first place I think.
Ok so I put headers on my 400 4x4, did the exhaust myself and ran 2.5 inch pipe. Should I put a crossover pipe on it?
I wouldn't bother. I did it to a set I used to have on my truck. The only thing I noticed was it "very slightly" mellowed out the sound, and that was all I noticed it did. Big disappointment for all the time & effort.
"Testing at 2550 RPM and 3050 RPM, primarily at part throttle, in HP ranges from 35 to 125, Stahl found that a balance tube actually hurt fuel distribution on every manifold/header combination he tested. It never helped at full-throttle power, either."
I liked the difference in sound on my '65 Mustang, but for the street, I guess that's the only advantage despite years of claims to the contrary.
I don't get the article, maybe I didn't read it right--seems they still say the x-pipe or merged pipes worked better--but the H pipe didn't do the trick...?