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They are efi but the exhaust sounded the same when they were carbureted
The exhaust with the x pipe is 16ga individual mandrel bends and tubing all tig welded together
The exhaust with the H pipe is a hooker mandrel...
Idk, ive been researvhing and On the tests Ive seen they don't make any difference until over 7k rpm and none of my Mopars will ever see that.
The one with the H pipe sounds good. Oh and the H pipe is only 2-3" long so it's not like it's much different than the x pipe
I have two different 440 powered vehicles an exhaust system sound so completely different between them. they both have the same size exhaust,...
Both my van and my pickup have 440 in them with Hemi mufflers. the van has an x pipe the truck has an H pipe the truck sounds a lot better to me