It has never been legal to remove smog equipment in Ontaqrio but in the last 3 years, in our general area, they have started to enforce the law, pulling cars over and doing a visual. EGR, cats, smog pumps where applicable, heat stove and the like have to be there. They are never checked to see if they are working. They just have to be there. A bit of a farce but that is how the game is played. I guess they need some more money coming in. I bit the bullet and went back to stock exhaust manifolds and smog pump on our L78 car. Seat of the pants is a poor dyno but I honestly didn't feel any difference from before to after the switch back to stock. It's just a lot easier on the wallet if you get pulled over. The high flow cats out there today aren't going to hurt performance much if any at all.