Wiring Harness - Converted 2GR
To get your new 2GR running in your MR2, the easiest thing to do is to swap in a pre-modified harness which allows a turnkey experience. Built to mimic a factory harness, this will allow full functionality of all the 2GR features in the factory MR2 setup. This harness will also plug into the Rat2 Motorsports Tach Adapter, allowing the factory tachometer to be used with the 2GR.
Core harnesses are not necessary but will reduce your cost.