https://www.e90post.com/forums/showthread.php?t=1312458
What I could find on the ARM - from the first page, it looks like it’s a good low cost option that competed well with the VRSF 5” intercooler.
https://f30.bimmerpost.com/forums/sh....php?t=1518971
ATM outperformed the Wagner
https://f30.bimmerpost.com/forums/sh...1651084&page=2
Turbosmart BOV