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wai on a kia rio worth it?
I was looking at doing a wai on my Rio during the winter time when my car idles its rough compared to summer and my MPG decrease from 32-34 to 28-30 is driving me insane. I plan on buying a 2nd intake hose from a Rio and modifying it to go near the engine instead of by the headlight. I was more wondering if doing this will have a negative effect on my engine or actually give me better MPG.
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