Yes they do vin verification.
Yes, all Air Care stations do VIN verifications. The cost is $20.00 I would know since I work for the company.
Yes, they perform VIN verifications
No, but most car dealerships will do a VIN verification for free.
Yes
No all they do is check to make sure your car is not putting off too much exhaust
Not sure, I'm sure you could give a call though.
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