The stock Euro (Messico, non-S/A) silencer, that came on my '98 EC250, was by far the quietest, non-modified silencer I've ever had on a GG. It killed me to hack 6" off it to attach a USFS-legal S/A. Before adding the S/A it tested in the high-80s. After adding the S/A it gained ~4 dbA.
For a...