Any problems putting 3’ exhaust on 70 Dart ?

toolmanmike said

Sure, I shouldn't have used the word backpressure if it's getting the experts here all jacked up. Plain and simple, the OP probably wouldn't notice a increase of performance in a 3" system v/s a 2 1/2" system other than the cool factor and a little difference in sound. I don't think a 3" system is necessary unless maybe you stick a 505 stroker in and you probably shouldn't be running it on the street anyway. That's my opinion and I'm entitled to that.

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Well that’s different then. You are suggesting that the 2.5 inch exhaust doesn’t have enough back pressure to warrant the increase in size to 3.0 inch. And I’m not disagreeing with that.

There is a HUGE difference between saying 2.5 inch exhaust will not pose a significant restriction to the point that an increases to 3.0 inch exhaust would show very little to no improvement and saying a “little” back pressure is a good thing. The former I agree with. The later I 100% disagree with.