I think I'm mostly, or completely in agreement with you. When I finally get around to getting this done (hopefully soon), I will drop the rear section of the exhaust and not change it at all. And the front section will not be changed. Only this section that I bought will be changed. I will be running no 2nd cat, and a thrush straight through muffler. I suspect it will not sound so good.
And if not, I will put the original rear section back in the car (myself).
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View my fuel log 2020 Mirage ES 1.2 manual: 42.5 mpg (US) ... 18.1 km/L ... 5.5 L/100 km ... 51.0 mpg (Imp)