What are EPA/CARB Compliant Parts?

Christian from BD joins us to answer this question! What exactly is a compliant part? How is it tested and validated? This leads into a discussion about what parts need testing data, EPA testing vs CARB testing & more!<img src="http://feeds.feedburner.com/~r/streetdieselpower/~4/LtLSOx9ty0A" height="1" width="1" alt=""/>