So I did a k20z1 swap in my 02 ep3 with 5speed trans and.... Ran without issues 😐 used k20z1 stock ecu and that you just plug in to your stock harness no Mods. Used the key and immobilizer for the k20z1 ecu of course. No check engine light, everything reads up right like it's supposed to. Only difference is... More power and real VTEC 😍👌🏽
So once again... Motor, ecu, key and immobilizer, that's it