had one on my old 8v, but i also had stainless steel manifold and only a rear box as replaced the centre box with a srtaigth thru pipe.
in terms of sound i can really say as i decatted the same time i replaced my manifold. but i would think it would make it abit louder as your replacing it with a straight thru pipe, if that makes sense

the car did feel more smoother with the full exhaust. oh and it was loud
