tuning

Hi I’m trying to find a good way to get my car working correctly with my exhaust and waste gate And bov so basically I want it tuned it’s an import from japan I’m in Canada I really don’t want to do a usdm swap it’s a 2000 forester sti auto with a ej20 thanks in advance for the help

Hello, I will be tuning next weekend my 05 Fxt AT. How can I hold the selected gear for the entire RPM while flooring it? Seems like everytime I floor it, the car will automatically downshift, which is not good for tuning.