318 vs 340 exhaust manifolds
Took me a bit to figure this out.....................(how to post the photo that is)
What would be more interesting would be to see some more comparisons.............
at 350, 400, 450 hp, , eh?
http://www.moparmusclemagazine.com/...307_mopar_crate_engine_exhaust/photo_17.html#
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