- Reduced trim features a 7mm screw and T20 screw. Take out and pull down tricky. Not necessary to remove reduce trim for 2018's. Speedometer conveniently calibrates to OEM or aftermarket automobile speed sensors along with the tachometer is able to calibrating to a lot of engine varieties Based on https://jasperbnzis.bloginder.com/32545545/the-2-minute-rule-for-mustang-digital-dash-upgrade