I do have to keep a set of 33 inch tires for the test which is annoying. But funny when on the dino. Mud terrains make far more noise than any exhaust. They also don't know the difference between 4wd and awe. Even if they put mine in 4wd, it's still 2wd unless you lock the hubs.

One time I took it there and the xterra was swarmed by every tech. All looking at the engine a front wheel wells. I thought something was wrong, so i went out and they said since they could see all the cats and sensors, they wanred to show the newer hires what they looked like.

But these tests are a joke anyway. 99.x% of vehicles pass. But the silly EPA won't let Denver metro stop since we exceed level too many time per year. But they won't tell you a lot blows in from the west and no amount of emissions control on the front range will help.