I haven't installed a JB4 yet, but plan to. As for traceability it seems like they would just need to look for the holes poked into the O2 sensor wires and evidence of any velcro or other wire-management, no?
The holes are hidden under the loom but you can also just buy the plug and play fueling adapters if you don't want to poke a hole.
Kia/Hyundai/Genesis JB4 PNP Fuel Wire Adapter
These plug and play quick install adapters allow you to install a posi-tap for fuel control tuning without piercing the factory o2 sensor wiring providing a completely reversible connection.
burgertuning.com

