Tsujiou Kosho (HST) produces original brand HST scarf.
In addition, we produce and sell silencers such as construction machinery and other soundproofing devices using the ability of the accumulated with automobile silencers.
Center pipe (sub-muffler) is installed to supplement the volume of the main muffler and improve the resonance properties of the exhaust system.
The separation between the main muffler and the submuffler is divided by the size of the silencer, and many have a relatively simple structure.