Yeah I guess with a Civic (and any NA car really) NA>Boost is a massive change! They're fine to change turbos on the stock ECU, it has the capability to fuel up to just under 0.8 bar (fuel cut). Then you can go with FCD and RRFPR, Plug and Play ECU, Piggyback or Standalone! But back on topic, WELL worth doing IMO. As soon as I experienced TD04 my CT9 felt obsolete haha. Just saving until I can afford a nice WEPR TD04 kit!