I wonder if units like PVCX are in the target zone here. From the article, it seems the tuners involved in this case went beyond mere fueling and timing changes to include ability to disable various emissions systems. Still...
EPA Fines Tuning Company $300,000 for Producing and Selling Emissions Defeat Devices
EPA Fines Tuning Company $300,000 for Producing and Selling Emissions Defeat Devices