Huzar Exhaust - Anyone Heard of Them?

I came across this Huzar exhaust on YouTube and for some reason, the sound of it on the Silverwing struck me as being better (to my ears anyway) than anything else I've heard.



It's lighter than the stock setup, 100% stainless steel construction and quite reasonably priced (USD $155 plus shipping).  

I see it does not have an O2 sensor port and when asked this specific question (below the video), it went unanswered.   

Their website says they've been fabricating exhaust systems since 2005.  

https://huzarexhaust.eu/

NOTE: Unless you speak Polish, you'll need to use their "English" button at the bottom of their website (or use Google Translate). 

Does anyone have one of these, know someone who has one or has anyone ever heard of Huzar exhausts before?  



UPDATE: I wrote to Huzar asking about the O2 (Lambda) sensor. I received the response below.

Hello.
The scooter in the picture in my offer does not have a lambda socket
because this model did not have it yet.
But of course there will be a sensor socket if you need one in yours.
I have a developed intake tube with a socket for the sensor.
Best regards
--
HUZAR Exhaust - Motocyklowe układy wydechowe
mobile: +48 693 322 013
E-mail: biuro@huzarexhaust.eu
http://huzarexhaust.eu/

I never heard of them. Looks like a nice muffler though. Not many search results about them on normal sites. Price is good mostly I guess because of exchange rate doesn't mean it's low quality.

Adventure Rider has some posts about Riders installing then on their Tenere 700 bikes really nothing bad to say about them other than no instructions in box. Adventure Rider is one of the best motorcycle sites out there.

Nice looking muffler, if you need one. The lack of an O2 sensor would kill it for me though.

Sounds and looks like Delkevic's glass packed mufflers except for the heavy ring around the outlet. There is a small hole in the bottom of the outlet that will make strange and (to me) unpleasant noises when left open and that happens mostly during deceleration. The hole is there to lock down a baffle. When I run without a baffle I use a round headed bolt with the head on the inside and a nut on the outside of the outlet.