I had the non-res exhaust on initially, but wanted some more grunt so I went with the downpipes. Drone above 3k rpm increased, but it remained quiet at idle and during normal driving. Once opened up however, a new level of aggressiveness is realized with the downpipes.Did you do the downpipes and exhaust all at once or did you do an exhaust and then downpipes. I am asking because I have the milltek non res exhaust already on and it sounds great but I wanted to know if there was much of a difference by adding downpipes if you did the mod in two phases.