Here is how I calibrated mine:
Step 1: Take plastic shield off, exposing the needles. Start car. Now you should know your car well enough to know exactly where the rpm needle should be at idle, so stick the rpm needle on.
Step 2: Follow somebody to a gas station. Have them text you when they reach the speed limit. Put speedo needle on at whatever the speed limit is.
Step 3: Fill you car(yes all the way you broke ass people lol) Put gas needle on at F.
Step 4: Drive home. By the time you get home your car should be warmed up, so stick the temp needle on straight up in the middle.
Step 5: Turn car off, put cluster back together.
Enjoy the new needles!
Disclaimer: I am not responsible for any calibration issues you might have by doing it this way, but it works if you know what you are doing lol!
Hatch Nation #8
September 2012 Ride of the Month