Brison 4.2. On a plane I bought and don't need. I bench ran it and it's good. super compression. A couple of top fins broke. $150.00

Engine is a 3.2

Hello,
All I need is the muffler with 38mm spacing between the bolts and is for a 4.2 (69 cc) engine.
If it meets these requirement then it would work.
Thanks.

Hector