The Stage 1 ECU is incredibly easy to install - just a handful of bolts mounting it to the firewall and then 3 or 4 large electrical plugs on the face of the thing. It takes any of the turbo engines up to the same 245HP/265ft-lbs. Installation will take up a good 15 minutes of your day, even if you have zero mechanical ability. If you can turn a socket wrench you can do the install.

Back when I got mine these things were going for about $350 but today they're closer to $600. You can find them used for less, but you need to match model year and transmission type, then send the unit off to a company called Flight Systems to have it reflashed for your VIN.

Check out PTCrew.com - Learn it or Burn it. for all the info you could ever want/need to know about performance mods on these things.