I pulled the cluster out, and swapped all the stock bulbs out with red LEDs. However if you're planning to do blue lights, it won't shine through the stock gauge faces all that great. You'll end up needing to sand the back sides of the faces to get the orange coloring off. That would involve a lot of trouble with needle calibration though, since you'd need to pull them off. My red set-up is only temporary though. The red is there just so my needles glow red. I'm getting blue face replacements.