RE: Cannisters...what are the differences between the mfg?
To further muddy the waters -- some canisters are mufflers -not tuned devices
just looking at the outside is no clue whatsoever.
Just because power is better than a in cowl muffler does not mean it is tuned - many in cowl mufflers are power robbers and using a simple in fuselage muffler can increase power -with no downside -no tuning problems .