OS .46 FX & Bisson Pitts muffler combo... Problems?
I used telescoping lengths of K&S aluminum tubing that I RTV'd inside the stock pipes. Was able to sit at the field with a bunch of precut pieces of tubing and tuned the pitts muffler until the 46 FX would needle properly. For some reason I wanted smoke coming out of both of the exhaust stacks.
Rich