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Son has only had his '17 RS V6, A8 since 9/30/17, and if it has shifted down to 4 cylinders, I have never noticed it. He still has less than 2K miles on it. Heck, I didn't even know it had this feature until I read the owners manual. Question: We didn't get it because of extra cost, but does having NPP exhaust increase the cost of your insurance?
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