The Auto Meter Tach adapter is perfect for the 95.5 and earlier Miata that has upgraded to our Coil On Plug System with the factory ECU. The included instructions also apply to the Fab9 Coil on Plug system. This will allow you to drive the factory tachometer after upgrading your ignition system to the Fab9 Coil on Plug.
How easy was it? Didn't even make it through a 6 pack. My son and I finished our 2nd beer and were done. Didn't have to visit any website or call 911 for help.