I have both a 2002 Impala LS and a 2003 Grand Prix GT, and I am curious as to how well the stock GP exhaust would look and fit on the Impala and the other way around. The Impala is my car, and I care more about the appearance on that. My fiance drives around the GP and doesn't care about the looks as much as functionality. So, how well would the fit and looks work for these? I want a stock sounding dual exhaust for the Impala without having to spend more money than needed. Thanks!