Yamaha XT600 cheap DBkiller testing 

Small video or I test the sound of the exhaust of my XT600 without noise reduction, then with the original DBkiller of the silencer Dominator, then with a DBkiller buy from China for less than $5 ! :)
The result is interesting, it seems that a cheap DBkiller is very effective compared to the current dbkiller! :p
Unfortunately you can not hear the real noise, because the camera uses a noise reduction encoding... :S
But the ear is really very noisy! that's why I'm using a decibel-meter :)
I apologize, this was a non-professional test done with basic test means and in a non adaptable environment, but it can give you a little idea of their effectiveness and a low cost solution if you have problems of control with the police or other... ;)
I hope this video will help you ! :)