Heres my take. I test drove one with the stock exhaust. It had a nice low rumble to it, not too loud, but nicer than I expected a stock exhaust to sound. Then I bought a 07 with the low mount arrow. Volume wise it might be a tad louder, not much, but the tone is much richer. It just purrs at idle but when you get on it, the sound is like a porsche or ferrari. Personally I love the sound, I get annoyed by bikes that are loud, the arrow is like music to my ears. To me its like a nice les paul cranked through a 18 watt amp :-)
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