Foamcut,

The mufflers from Ken are 1” x 2” x 2 1/2” outside or .750 x 1.750 x 2.125 inside. The volume is 46cc. And yes the mufflers are not particularly quiet.

The original muffler without packing is slightly more than twice the volume of Ken’s muffler. A 16 to 1 ratio would be hard to achieve. I believe a ratio of 4 to 8 would be achievable and quieter but don’t have the material or equipment to experiment. 1 1/2” by 3” steel tubing would provide a starting point for experimentation.

Bill