Big Block Exhaust Manifold Comparison?

4mulas said

You seem to already know by all the road tests you’ve seen and read, so isn’t that good enough? You could always rear wheel dyno your car?
Good luck

Click to expand...

One of the magazines did that back in the day with a factory M code. They concluded after all of the calculations regarding drive train power loss that the engine was right at 375HP and the manifolds didn't cost one red cent for HP.