RE: Jett Stream for OS 55AX
I have 2 OS .55AXs that I have used my JettStream muffler on. It's a great combo. I gained 1700 rpm on an APC 11-6 and 1500 on an APC 11-7.
I used to run a lot of tuned pipes, but with the Jett Stream, there's no fuzz, no muss, no bother. Just bolt on, tune and hang on. It's so easy it ought to be criminal compared to cutting the header and testing and cutting and testing and cutting and testing...
Try the 11-6. You'll be smiling after your first flight.