....I've done over 40,000 miles on my Milltek Non-Resonated Hi-flow+Downpipe Revo Stage1 and the exhaust sound is perfect in my opinion. Sporting when she revs but sophisticated when at ease. She seems to sound better and better and, yes, she does loosen up and, yes, the turbo seems to make her fly if you use the gears properly. I've just done a 220 mile ride this afternoon on mixed roads M5, A- and B-roads.