Decimate is a word used to indicate the death or destruction of one tenth of a force, unit, or element. You cannot "decimate" a mechanic.

When I first purchased my 2007 Pontiac Solstice one of the first thing I found wanting was a decent sounding exhaust system. Went on line and discovered that a good after market system runs north of $500. So, I hied down to my local muffler shop where the 75 year old owner removed the huge resunator from the end and…