I think the key is the length of end can / silencer. I have Tyga chambers on my MC21 Trck Bike, but with ultra short cans (non Tyga).
The silencers are about half the length of Tyga's. Last time it was noise tested at a track day, it measured 107 db.
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Rich
MC21 Track Bike / RS250 NF5 'Spencer', NX5 'Cadalora' & NXA 'Aoyama' / RS500 / Two Brothers Racing RC30