It has never been legal to remove smog equipment although the laws have never been enforced until the last couple of years. I spent a couple of thousand dollars getting our L78 Chevelle smog legal. The stuff just has to be on the car. They do a visual. Cats, heat stoves, closed Breathers and smog pumps where they were used originally are what the MOE guys look for. Fines for each item missing. They don't test your car but CAN if they want to from what I understand. The MOE guys are indeed on the prowl at least in the Peterborough-Port Perry area. We sold our Chevelle to a fellow in Langley, B.C. Out there, the old cars have to pass the emissions test once when it changes hands so it was good that I had that job already done. All the time, I see cars for sale on KIJIJI with all their smog equipment missing. I wouldn't touch one on a bet. Most of the stuff isn't being reproduced and can be hard to find. Keep all your stuff on the car just so that you won't be looking over your shoulder all the time. Truth be known, our Chevelle ran just about as well with the smog pump and manifolds as it did with headers. You would have to be on the drag strip to see the difference. What was really killing performance was the lean factory jetting and unmercifully slow, and retarded advance curve.