the ACT..i have one in my car and havent had any problems...i really like it...i have had friends with acts that have had problems but you know how that is...everything isnt perfect

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The original SOHC Si Civic...1993 Civic Si Aem Intake Aem cam gear Greddy Exhaust DC Header....
Watch out all you new Sis..they arent as quick as you think!!!