NVU 64-1/2 - 66 Mustang DIY (Do It Yourself) air core kits have just about everything you need to complete your install. Kits include premium molded dash panel with back insert, 6 gauge kit with 3-3/8" speedometer, Tachometer, oil pressure, volt, water temperature and factory match 73-10 fuel gauge (uses stock sender, not included), sender bushing kit, programming button (electronic speedometer) and instructions. Air core instruments feature incandescent perimeter lighting and short sweep minor gauges. Tachometers operate on 4-6-8 cylinder configurations. *Speed sender may be required on electronic speedometers-check your application. **Mechanical speedometer has 5/8-18 threaded cable with .104x.104: square drive.