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Yes it has an egr valve, it recirculates exhaust fumes which is supposed to give you better gas mileage, mine has run without it for over a year, they do suck and that's why I haven't replaced mine. That being said I'm not sure about WV but my car doesn't pass inspection without the EGR Valve but that's ok because a lot of other aspects of the car are illegal and I have a friend that owns a shop.
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