I have the FMF Gnarly pipe (Woods Edition), and the Turbine core 2 silencer. I have been very pleased with the pipe and silencer. The hit in the mid pulls hard and the silencer is quite enough to not disturb the peace. Quite is not always bad... Sorry that I have no pics, but thought this might would help. The silencer did develope a crack in the piping just before the silencer, where the mount is to the frame. The pipe does leak a little oil, but I am going to take off the pipe and use some RTV silicone to stope the leak at the cylinder. I have no idea about the pro circuit stuff, but the FMF stuff works great, with a few minor flaws. R. Shane Dudley Hallsboro, NC