I've sold my impreza recently and no longer have any need for these. They are Reverse Glow Gauges and will fit 98-01 Imprezas. There is a switch to change the color when lit, you can also dim and brighten them. They can be easily installed so that they light up and turn off when the headlight switch is used.

One little part is cut (which i ciricled with red in the picture) so that i could get it over the needle. The cut doesnt effect the gauges in anyway. They still light up just fine. I'm asking $20 shipped.

 

another picture