I recently went to get my car inspected, I dont have to have emissions here in NC but I still fails the "Thermostatic Air Control" part of the test. The guy told me that the air cleaner on my car should have a metal tube that goes down around the bottom of the engine and just sucks air up in to the air cleaner to make the engine burn the hot air off the engine first. He told me that it would not be a Open Element type air cleaner, cause it has to be able to close the snorkel I guess, and suck the air through the tube (termostatic air control tube). My current Air Cleaner is definitely not original and I have never seen the original, mine is a Open Element type that looks allot better and probably lets the engine have more air also. Anyway looking on Classic Industries website all I see is open element type air cleaners. What is original on a 69 firebird? and also where could I find a air cleaner that I can use just to pass inspection? I guess any snorkel type air cleaner that has thermostatic air control (silly tube) on it would work. I am also going to try to just take it somewhere else and see if it passes like it has before, but this is a probably not a bad idea.