Definitely louder and deeper than stock, but not too loud. Stillen and Invidia are probably the quieter systems out there. At cruising speed, it is barely noticeably louder. It's louder when you gun it. Bluestyle55 has a good comparison video for stock+Gen3+Invidia posted here and on Youtube. Just search "Invidia db comparison". Like most exhausts, the most gains are at the top end. There is some low and mid range improvement but not proportional to the higher range. Once you finish your intake/exhaust upgrades an ECU tune will help improve the low and mid-range performance, amongst other things.
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2012 GT-R Black Edition Jet Black
2010 370Z 40th Anniversary // SOLD
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