I haven't installed them on my BMW X5 V8 car but I have them on a similar car with the same one heard Motor and they sound good, but too dull in tone for my taste, but at the same time they have a good volume (and a little drone). They'll probably work well in some non-resonator applications and maybe better with a resonator in other applications. They sound decent overall but I went with a slightly more expensive muffler which would give a more open sound.
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