Thinking of swapping mufflers but got a question pertaining to my 340

71DodgeDemon340 said

I know more flow in theory should be better but is there a issue of reducing back pressure? I always thought back pressure helped low end torque but im not 100% certain. I guess a less restrictive muffler should help as it was dyno'd with open manifolds

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If back pressure was good, then a good set of headers would lose power. The last thing you want is burnt exhaust in the combustion chamber.


The stupid backpressure myth has been around since I was in high school (read a LONG time ago) and it was ridiculous then. These old wives tales just won't freaking die.