Do exhaust cutouts increase horsepower?

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Author's Note: Do exhaust cutouts increase horsepower?

I had heard of exhaust cutouts in my car-loving life, but I'd never seen one, and I'd never really wondered much about them. I was happy to learn that such a simple, straightforward piece of automotive equipment could do so much for a car's power. Happy enough to run out and buy myself a cutout? Not quite. I'm saving up for a turbocharger, myself. Besides, an unmuffled Subaru Baja on the drag strip just seems silly, right? Whereas everyone knows Subarus love turbo on dirt roads -- and so do I.

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