Review on ACECAR Universal Dual System 3.5 Inches HUD - Head Up Display for Car with OBD2 GPS Interface, Speedometer, Engine RPM, OverSpeed Warning, Mileage Measurement, Water Temperature - Suitable for All Vehicles by Steven Brouillard

Very easy plug and play installation on my 2002 Civic SI. The OBDII input is great for that. I assume this will work with any OBDII vehicle, not just 2008 and up. My only complaint is the very slow update. It looks like the HUD updates about once a second, so the RPM data is pretty much useless. I basically wanted there to be an easy way to see my speed so it does what I need it to do.