looking for into on direnza exhausts was looking on there website and good prices on exhaust for e36. has anyone used them? how loud are they?

Seem to be 2 different e36 ones

325/328 http://www.direnza.co.uk/bmw-e36-325...st-system.html 3inch tip
m3 http://www.direnza.co.uk/bmw-3-serie...-back-box.html 2.5 inch tip


any info much appreciated