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what would be better??...AEM or Injen... or should I even bother with it since my car is an auto...

 
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i have auto and i have injen sri, it feels smoother through the powerband... but i dunno about any hp gains... i think for sri's aem or injen is the same in performance. i think it's worth it if you live in an area where theres a lot of rain/flooding. if not, i'd get spend 50 bucks more and get the cai, and since you have an auto, only the injen cai would fit. hope this helps