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I just finished the install in about 50 minutes ( jack stands and on my back). It feels lighter as it should without two cats gone. I purchased at Tischer BMW - best price.
From a startup and quick rev you get a little more bite (backfire type sound) as rpm's decrease but I can't tell any major difference at idle and on the upswing of the rpm.
I'll be driving it hard tommorrow and will update my post. I expect it to have a nice affect at speed.
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