If it's the Volvo boost - o - meter, then you won't go very high anyway (not very good the volvo ones)
Noise wise, I know what you mean, with a standard pipe, they're not supposed to be loud, they're an executive tourer after all. Mine's almost silent when cruising. It's when you open her up and get that lovely 5-pot roar that only a T-5 makes, coming up through the floor. Always makes me smile
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