so I was told that if you have an exhaust system your car won‘t pass smog check is it true. How do people with exhaust system pass there smog checks
Agree with what Gary and Nikolai said. A Faraday cage shields e-field noise. For h-field (magnetic) shielding you need a low reluctance shield; i.e., mu-metal.
Aluminum foil; it works for them UFO probes!
if you can afford it gold foil, or lead foil will work as a cheap replacement.
All cars have an exhaust system. That's the bit of pipe and assorted boxes between the engine and the tail pipe So I assume you mean a custom exhaust, that's a bit less restrictive and louder? If you just chop out random pieces and put in straight pipes you probably wont pass emission inspection any more. But it's generally possible to modify an exhaust system somewhat, keeping the catalytic converter etc, and still have the car to pass emissions. Just have to know what you are doing.
