If you are driving the cx9, the stock turbo is pretty damn good. 17.4 psi and its small. The MS3 turbo stock is only at 15.6psi and I think physically it is a tad larger than the cx9s. If you want to upgrade anything, replace the turbo with a stock one and upgrade the piping, intercooler and toss on an exhaust. You'll end up paying the same for all of that then for trying to rig up a new aftermarket turbo and making it work better than the stock one. Until someone makes a solid piggyback tune for the car, supporting mods should be priority, not a different, new turbo.