@Scooby1 I've got the standard sti exhaust, with a prodrive back box. It's nice and quiet when ticking over and cruising but sounds nice when you open it up. I'm going to do the resonator delete from the centre section to make it a touch noisier, but should still be fairly quiet with the cats and prodrive back box in place. Would recommend the prodrive if you want a subtle, fairly quiet exhaust.