Technically, a muffler quiets the engine by reducing the sound pressure emitted. The factory mufflers on your Mustang are made to sound good, but are restricted by efficiency concerns, ease and cost of manufacturing, and of course sound level laws. For many enthusiasts, the stock mufflers are too conservative.
RE: nominal. 25 Aug 06 13:08. A nominal dimension is one which the tolerance is based from, which is not necessarily the optimum size. A dimension can have a Push Fit or Press Fit tolerance of say +.001/+.003 showing that the actual nominal is NOT what is required.
The definition of a diminution is a reduction in size or a reduction in the importance of someone or something. When you are demoted from President of the company to assistant manager, this is an example of a diminution. a diminishing or being diminished; lessening; decrease.