I'm not sure, but I'll take a stab at it: 1) It's a lot better looking than the one that comes stock, 2) It's an easy mod, less than 10 minutes to do (check the DIY section for the short mod, basically, you can pop the old button out easily and swap in the GTR one. I used a flat bladed Exacto knife & 3) well, it's from a GTR
The map light lenses are from a GTR also.