I just had my old magnex twin dump exchanged for a newer one, largely because I bought the original second hand and it had a missing bracket, which meant the turbo was holding the weight of the exhaust - not a good scenario.

However, have found that the low tone rumble that I was so fond of has gone, and been replaced by a quieter, more modest rumble. Not had chance to open it up yet, so wondered if others had a found it to be similar, and if they have found that power seems to have dropped off a little with the newer design.