Looking at my setup today and it's hard to say what was modified or not. The headlights that was installed are Sonar brand and according to their website, no modifications are required to install them on a Corrado equipped with e-codes from factory which is the case. So I guess it's safe to assume that the original hiring loom wasn't modified and I should be able to remove them and install my e-codes "plug & play". I'll find out over the winter when I remove the front of the car to get the engine out I guess. Cheers!