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5851a · 06-01-2020, 04:32 PM

I wonder if back in the day the muffler was a restriction so the police manifold would give you 2 mufflers on the car. Police needed to be quiet. Seems like it would be a lot of engineering, must have made a bit of difference.

06-01-2020, 04:32 PM	#19
5851a Senior Member Join Date: Oct 2014 Location: NE Iowa Posts: 1,664	Re: Rear exit manifolds for flathead 39 Ford I wonder if back in the day the muffler was a restriction so the police manifold would give you 2 mufflers on the car. Police needed to be quiet. Seems like it would be a lot of engineering, must have made a bit of difference.