I apologize for the double post, the questions was in regards to the legality of replacing catalytic converters, especially in California......
This is a very good question and a valid concern.
We often get the question of "legality" of many of our products and aftermarket products in general.
In the strictest interpretation of the law, most modifications done to our vehicles is "illegal". This would include intake
modifcations of any sort , and catalytic converter upgrades.
Lets focus on catalytic converters. Being in California we have the strictest rules and emmissions standards. Often a product will boast "CARB certified" which is the "California Air Resources Board" , meaning it is CARB approved in CA.
However, much like you just pointed out, it is actually illegal to even remove or replace your catalytic converters unless they have failed! So even with a CARB cert. you still cannot replace them unless they have failed.
Thus, when purchasing we always must inform our customers that they are for "offroad purposes" which is almost always the case for catalytic converter upgrades.
However, these will in fact pass Smog TESTING , meaning they will pass visual inspection and the "sniffer" test which the actual emmissions testing.
So the bottom line is that they will pass a SMOG test, however under the strictest interpretation of the law, they are for "offroad purposes only"
I hope this clarifies everything. Unfortunately this is the nature of the business, especially in California.
Dyno runs have been recorded and we will release them them once we repeat a new baseline due to some runs with our prototype intake manifold. We are seeing gains of 16-24hp in various areas through the powerband.