Bub Exhaust for your Triumph Bonneville America or Speedmaster allows the rider to keep true to the traditional styling of their Triumph Motorcycle. The Triumph America & Speedmaster Bub Exhaust produces a distinctive deep throaty tone that will leave your friend in awe. The Bub exhaust delivers on performance. To further increase performance we recommend combing the BUB exhaust with the British Customs Air Box Elimination Kit.