I disagree, I am very particular about my exhaust. Both sound and looks, I have swapped many a tips on the same exhaust system and you can tell. The bigger diameter not as much but add some length with a diameter change and the note gets deeper.
I disagree as well. I have a 4" straight pipe. I drove it for a month or so without a tip. I ended up goin with 7" tip, 18" long. At WOT I definitely can tell the difference. Even at idle it sounds deeper.
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