I’m Replacing My Ecotec Motor With An L67 – Do I Need To Replace The Entire Loom?

The standard Ecotec loom is only slightly different but will need to have wires lengthened to make it work, which is easy to do. You'll also need to have a revised memcal/chip to suit which we can supply to disable some sensors which are no longer used on the new supercharged engine, such as the boost bypass solenoid. Otherwise, you'll have to swap the looms completely, which is quite a large job and would add a considerable amount of time to the conversion, which IMHO isn't worth it considering the much easier previous option.