I ordered a 2016 turbo for my bike, intake, downpipe and complete exhaust. The internal hum was very loud and annoying, so the purpose was to eliminate the internal hum and keep the exhaust flowing. Overall very impressed with how it sounds for a 4 cylinder turbo engine. There's still an aggressive rumble, but no longer an internal rumble. Still pops/clicks between shifts and gurgles/crackles on downshifts.