so i took my 06 wrx in for its emissions test today, and failed with flying colors. its a stock motor with a turboback exhaust and a tune, nothin too outlandish. i had issues with passing emissions 2 years ago as well, ended up welding in a new cat and eliminated boost. where im really struggling is with my NOx levels. the hc's were just barely over limit and i think a fuel additive will take care of that, but the NOx was 5.2 with a max cap of 1.5....so i was almost 3X over the limit. the shop that did the tune on the car 2 years ago somehow disabled the turbo and i was curious how they did it. is there a way to pull the vacuum lines and keep any boost from reaching the cylinders, if only for a few miles to the test and back? im not extremely good at DIY but id like to at least give it a shot, i dont have the money to buy another cat and weld it in.