I was the official noise tester at the recent CAOCC event in Australia in which Akiba was using this exhaust system. I can tell you that the noise was no louder than the Asano and longer version Hatori on the ground. In the air I felt that the noise from the 821 was slightly louder. Performance was equally impressive from all exhaust setups when attached to the DZ160.

The 821 is ideal for people who have one piece wings. There is no need to remove the exhaust anymore when disassembling the model.


Peter