civics are slow and meant to save money, dont waist your money on preimum gas. It will just raise the operating cost of you car. also premum gas is harder to burn why put it in a car that dosent need it, thats my view
also, I blew up my aem intake with a wet 55 shot so redline civic will not have his engine for long with his knowelge sorry
(fuel puddled and back fired)
btw my intake is fine now just a little scratched
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