Originally Posted by bernard54321
im a smog tech in l.a. if your cats are in place and all oxygen sensors are not tampered with or relocated you should pass. everything after the cat and post 02s is not smog realted but i have seen a few people fail for it :/ idiot techs....
engine wise you can do whatever the hell you want as long as it comes with a c.a.r.b. e.o. approval number on it
Thats the thing the OP is goin to try to pass with just secondary cats, and catless down pipes.