I'm going to change my exhaust system to Magnaflow mufflers 3" (oval body, stainless steel). I'm wondering what pipe location to choose. Example: middle offset - center; end center - center

or middle offset - offset; end offset - center

I'd like to achieve best flow according the shape of the car.

Audi A4 B5 1.8T Avant quattro '98

Thanks in advice