Anyone have a yoshimura y series slip on?

I did make one at idle compared to stock but it really doesn’t sound much different since that valve is closed. Once riding though it comes through way better. I will make one warmed up and revving some but there is also a sound clip in that Leo Vince link which does a pretty good job depicting the sound. I also noticed the occasional popping on some downshifts.

Edit: Leo Vince -
Stock -