most places wont pick up on boost controller, safc. Turbo timer is legal, it's not being in your car while it is running that is illegal.
They will omly pick you on exhaust if it is really loud, they wont measure the db or anything. Most places will get you for oiled pod or pod not secure, but only some will get you for having pod + cooler.
They will all usually measure height.
Then you have the other normal things, all lights in operation, safety devices like seatbelts etc, tyre tread, window screen cracks, brake pads etc