Mean R/T did you check to make sure they are smog legal. The last time I checked they were not in California or any headers for Chargers for that matter.
I actually called and talked to the company. They explained how they get the CARB approval. Basically they said CARB makes them test on the top of the line vehicle to see if it will pass emissions (for all other vehicles under it, which does not make sence to me), so for Dodge they had to test on a Viper which did not pass.