Any problems putting 3’ exhaust on 70 Dart ?

yellow rose said
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.

Well now, hold on hoss. It depends on what kinda back pressure we're discussin here. Lets say for example, you spend all afternoon at your favorite Mexican joint eatin tacos, deviled Mexican eggs, jalapeno peppers and drinkin lots of beer. I would say the benefit to a lot of back pressure would be immeasurable. Just one man's opinion.