I ran the Mountune M380 and found it rather underwhelming. Coming from a 430bhp Impreza didn’t help, I guess! I went on to the M400 including the required hardware and this, whilst much better, was still not quite what I expected. The M400R which was a free upgrade to existing M400 users, was so much better but came with the recommendation of forging which had the effect of me not using it to the full!
I have subsequently ran the MSD420 and now, with the engine forged, MSD440 which feels very good and potentially better still once I’ve done some datalogging and the map tweeked by Stu at MSD All this by the way, using the Cobb Accessport which was originally supplied with the Mountune M380
If I were you I’d certainly give the MSD380 a try.
Johnd