Just to let you know I had a TERRIBLE time with the CN3033B on my OS .50 SX-H. It was to restrictive and the power was not impressive on my first gallon.
I ended up running a 3/8" drill bit through the stinger and into the internal baffle to open the flow up. It made the power like someone had flipped a switch. I did this as a sacrificial test to verify if the muffler was the problem or if I had other problems. Turns out to be that the CN3033B will not let the OS .50 SX-H breath.
I am now running a TT .50 muffler but it is not as effective as the drilled out CN3033B. So, I bought a used Curtis Muscle Pipe and believe that it will let the OS .50 breath properly.
Just wanted to let you know.