the size of the gauges are 2 1/16" i believe. i had to shave some parts of the panel to make it fit better though. i bought the voltmeter and water temp gauge from summitracing.com. they're VDO gauges, the closest look i could find to stock, exact match actually. the center gauge is an Autometer A/F meter but i'd like to replace it one day with a digital fuel pressure gauge...