I have it placed in my bike
Sound? The best
Performance? with PCV,BMC filter, -3 rear sprocket (525 still): 319 kmh.
Nice top speed
Do you have any video clips of your bike?
2010 S1000RR-Austin Racing GP3 full Exhaust - Brentuning ECU reflash & tune - Sprint airfilter - BST wheels - Ceramic wheel bearings , 5" stretch, lowered, Brock's Performance clutch mod & heavy spring kit & front strap kit, APE Clutch, -1 front sprocket
8.78 sec on 91 pump gas (8.51s on mr12 on my friend's similar spec bike)