Cobalt714
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- Joined
- Mar 27, 2011
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Ok so i just stuck an AEM cold air intake and a weld on n1 type muffler on my car and im seeing a big decrease in my mpg. before i would get about 25-28mpg on streets and now its 21-22ish im just wondering what could b the cause? and if i get rid of the muffler and stick the stock one back on would that help?
Thanks for your help
Thanks for your help