....to get to 10psi? Just the MBC and a boost guage to measure. You'll want some more airflow, too, so grab a K&N cone filter or buy a CAI (though I suggest waiting until more companies come out with one. I'm installing the INJEN tonight, but they're a bunch of dicks to do business with!) For high price there's a ton of electronic boost controllers (HKS, Greddy, etc) that'll work...but if you're just gonna go 10 psi full time, the MBC and a boost gauge are all you need.