I’ve only really noticed it on systems with less noise, the louder systems tend to drown it out but then you have to put up with lots of noise at higher speeds (really annoying at motorway speeds).
I’ve built a few exhausts but the one I built for my Polo GT was loud, more so at idle than driving speeds. Single round rear box that was too small really, no cat and a 4 branch manifold then 2” straight to the box. Couldn’t hear the tinny noise until I was outside the car especially with the bonnet up. The Volvo you can hear it in the cabin but it’s not very loud.
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940 B230FT
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