Since I started a thread in the R56 section and everyone with an R53 is replying I thought I'd start one here to keep them seperate as many people get confused when they read that and it's mixed together. So Please post what intake you have with what strut brace you have and if they fit or any issues so we have some referrence. I can tell you the M7 strut brace withs with 99% of the intakes avail.
The Alta CAI V1 will req some modding to accept any strut brace. This is usually only having to trim a bit of the rubber gasket on the intake box.