I have a MINT HKS Adjustable Wastegate Actuator for the T25 turbo for sale.
With this actuator you are able to adjust the boost by adjusting the rod length. It also has a stiffer spring to allow you to hold higher boost higher in the RPM range, and control spiking. Plus, its shiny and says HKS so it looks pimp status.
With this i didnt spike when i ran 12.5 psi with no other form of boost control!
you can adjust it in .25 psi incraments from 5 psi - 19.5 psi
$90 OBO Will deliver in the GTA