Do Bisson mufflers restrict performance?
Outcast,
You may have alreadt had the 60% or better area before cutting the ends. AllI did was cut the ends off. Nothn else.
Geistware,
The engine definately was louder but not as loud as the downdraft muffler. It had a smooth sound rather than a cracking sound if you know what I mean. By the way, we have no sound restrictions where I fly.
Ryan