Hah- yeah, a bit OT lol- the XZ has been tested to 30+ psi, the others use the same spring, so will handle the same. The thing is, it is more "how much of an increase over wastegate PSI will the MBC allow"- not really "how much max psi will it allow". If you have a 6 psi gate and are trying to use an MBC to get 30 psi, it may not do it reliably. If you have any questions, feel free to email me at [email protected]. Thanks.
Joe