Adding cats to Off-Road H-pipe?

[Rebel79]

Originally posted by jimberg
Oh, and yes, you must have the air pump hooked up for cats to work properly. The catalysts need oxygen to work. If they aren't working properly they will get clogged.

Yeah I forgot to add that. But if you want a fail safe way to pass smog, get an air stream thats ALWAYS on going to the cats. The Smog pump does not give air to the cats at idle, so they are not 'working'.