Check out this toy from PLX Devices. It’s a gauge that plugs straight into your OBD-II port on your car (assuming you have an OBD-II car) that delivers info on everything from RPM, engine load, coolant temp and air temp to error codes. Screw running a tangle of wires for 10 plus aftermarket gauges, this little pup does it all. It even lets you customize your gauge colors to match the rest of your displays. If you’re looking for a way to get as much info on your engine as possible for the lowest cost possible, PLX is the way to go. the DM-200 OBD goes for about $400. Click on over to their site to learn more, or follow the jump for an intro vid.