Can anyone identify this exhaust/silencer

[Sycamore]

Currently on a Yamaha XT600E (2005). I bought the bike with it on about 5 yrs ago.
Can anyone ID the silencer/muffler? No markings on it.
It's louder than stock muffler, with quite a deep sound, that's the only info I can offer.
Thanks

 

[Jughead]

 

[Noneking]

 

[Tommy Transalp]

 

[Gerard]

 

[zebra]