Autometer tach adapter model 9117 had in my 08 focus along with a 2 1/16 tach model 1397. was in the car for about a month the it got totaled. i have been sitting on them for 2 years now and i finally decided to let them go.
The tach adapter is for fords that have coil on plugs to hook up a tach to them.
$55 shipped for the adapter
$75 shipped for the tach with a mounting cup.