One of the biggest problems you’ll face boosting your Miata is turbo stud/hardware failure. Those 4 little studs are under an insane amount of stress as they endure 1000+ degree heat, immense pressure, along with the exhaust system movement and flex.
Even when I was running the strong Begi 10mm studs, they were coming loose all the time and I even broke a couple. That was only a 275whp engine that only saw driving events 6-8 times per year. With even more boost and power I wanted the best.