I've got one of Kens mufflers on the Homey in my Ultra Stik. It weighs 46.8 grams compared to 115 grams (weighed on a triple beam Ohaus) for the B&B that I took off. The single tube exhaust gave me 200 more rpm over the B&B on the same prop and it is much quieter. This doesn't work on all engines but on the Homey it did. Less than half the weight, more power, less noise, works for me!