The location of the CAS differs between the 1990-1993 and the 1994-1997 miatas.On
the
later cars, it's located on the drivers side of the engine, assuming a US car.
On the 1990-1993 miata, look on the passenger side. In the bottom photo, the
standard
12 mm hold down bolt was replaced with one from a 1994 miata because it was
longer.
