You will not get pulled over for it. I have had all kinds of different exhausts on my old cop car, including no exhaust for a while and never had a problem. And you dont have to worry about mileage for a LONG time, i put well over 60k in a matter of months on top of the already 140k without a problem. They are made to be driven and reliable.
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FOR A WOUNDED MAN SHALL SAY TO HIS ASSAILANT
'IF I LIVE, I WILL KILL YOU. IF I DIE, YOU ARE FORGIVEN'
SUCH IS THE RULE OF HONOUR.