i carnt talk about the st as i have mk2 1.6 but i have miltek on mine
i like it, was a little to quite for me but changed bumper to st and i had to take the tail pipe off and a really like how it sounds now hopefully it will keep the same tone when i get the 4" tail pipes made

although its anoying me at the moment as its making the heat shield rattle

also for you as far as i no it can be bought in resonated and non resonated