46yblock (3/10/2011)
I wonder what that exhaust system would show on the Dyno

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That is a good question! I've seen this kind of "Dual" exhaust on more engines than I care to mention, even back in high school I had a buddy with a '60 F-100 that said this was the only way to get dual exhaust on a Y. I don't think he did his home work. 