Yes, I am working on swapping SRT cluster into my Citadel. If you look at my posts, you'll see description of where I'm at so far. Since you're using a '21 bcm, I'm not sure if there will be other issues, so you're in your own uncharted waters with that. But, in the bcm under 'car configuration change' is a setting called 'Vehicle is SRT'. If you change it to yes, cycle the key, and drive it a few times, the tach and srt menus should show up. What will also likely happen is your abs, stability, airbag and acc/fcw will throw warnings at you on the dash. Thats currently what I'm trying to figure out how to change as alfa won't clear the codes from the individual modules. Turn 'vehicle is srt' back to no, and it all goes away, warning lights, tach, menus. If you can sort out why, and fix it, please let me know, i've been working on it for a week.