Just finished this and an LED swap in the OEM WRX cluster, I am waiting on an 04 Impreza cluster with the larger bezel rings... better matching of the bezels for sure. LEDs are more effective in MY04 clusters also. The gel film is better engineered. I used blue SMT LEDs from SuperBrightLEDs.com. They are 194s, and took some modding to add, so I ordered the 74s that the cluster uses, and will be changing out to the new cluster with those. Pics of that coming.