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I have a 2003 Subaru Legacy L with a 2.5l auto, completely stock except a k&n air filter. I m currenyly trying to eek out ever mpg out of it, I barely get 20mpg around town right now. I baby the thing. What is this air intake resonator delete? I live in a very hilly area so I m intrigued by this mod. Any other suggestions for my car I just did a fresh tune up, I still need to do pvc vavle and a fuel filter.
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