Differences between 92 magnum and 93 on by

YY1 said

NOPE!

92 was the first year of the magnum.

92 Magnum exhaust manifolds have slightly larger outlets. IIRC it's 2 1/8 vs the 93 and up 1 7/8".

That's the only difference I can tell you about, though, although it's a fairly well documented one, even here on FABO.

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I’ve got the 2 1/8 manifold on the pass side and a 68-71 340 on the drivers side. A while back when I was looking for the best flowing manifolds and I ran across a dyno test of all small block manifolds and the different ones were damn close in flow. I don’t remember
Where I saw it but a post somewhere
A guy said the good 340 manifolds he only lost 8-10 hp over a set of tti’s.