Arrow Thunder Dark UM DSR 125 EX 18-20 (4T)/SX-RX 125/XSM/XTM 125 Aluminium&Carbon Muffler

Vehicle type:

UM125-DSM.

THUNDER.

Last generation of street bikes are made following a precise design and style idea, giving a fundamental importance in using the smaller exhaust systems possible, placed in some ''non-conventional´´ position.

These styling and design features have an impact also on after-market parts, to use the smallest exhausts possible.

Arrow decided to use for several street bikes´ silencers a section initially designed for a completely different ''world´´ and the Street-Thunder range was born.

Street Thunder silencers are available in titanium, carbon fiber and aluminum, with the endcap (with a fully renewed design) available in stainless steel or carbon.

To compensate for the lower internal volume, research and tests have been done on racetracks and in Arrow´s R&D, looking for the better materials available in the market for noise reduction.

Street Thunder silencer are light and powerful, they are available as slip on systems or as a part of the full system (with Arrow collectors) and are available also in a street legal versions.


Many bikes are equipped with an exhaust valve controlled by a servo motor. When making performance changes involving the replacement of the exhaust or the installation of an additional control unit, it is necessary the elimination of the exhaust valve.

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