please when you post and try to help others out, post the right info. the aem where the maf is is smaller diamter than the 3 inch injen. the aem is 2.75 which is closer to the stock than the injen is. i sold my aem but i miss it already b/c i wanted to get a chip. some even run cai with chips and have it still run fine but who knows how the fuel mixture and everything is thrown off.