Cluster. Make your own Custom Gauge cluster
I wish I had done this with my stock IP instead of spending hundreds on a piece of plastic of lower quality. I saved my stocker though just in case I want to do it again.
After trying other stuff off ebag, parts stores etc I now get all my LEDs from
superbrightleds.com. Massive selection and they have ones with built-in resistors intended for conversions. They actually work and last more than a few months too...