I'm in the same boat. I have 2009 Toyota Camry acv40 2azfe. Currently done custom intake, custom headers and full custom exhaust with hi flow bullet cat. Got a set of cams to drop in and weapon R racing intake manifold. I've been told there is a piggyback option from haltech and link that can run the engine fine. I've got auto trans. I'm in Australia and limited option here although r9ktuning has good reviews for tuning the factory ECU. That is nearly always better. I'm actually looking for oil catch can and external trans cooler atm....hard life lol