Originally Posted by
aspeed
Most of the Enya stuff was designed in the 1970s when mufflers were not used much. There have been a lot of improvements since then. Even the newer Supertiger mufflers are a good change. I don't have one to test, but know they are quieter. That style, as well as the OS tend to tear off the lugs of the exhaust in a crash though. Headers are kind of nice that way.
I have a G51 Italian ST that I rebuilt awhile back. It came with a silent muffler that I ran it on for some power tests and later tried a .46 sized Jettstream muffler and actually lost power with it compared to the silent muffler. The silent muffler is heavier though.
The Enya 30 I spoke of is the SS series with twin ball races. I'm not sure when they were designed, but they succeeded the X series by some time anyway. The new SS 30 is ABC, but still comes with a lapped piston like mine.