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  1. Engine Modifications
    Hello 2020 Wrx Cobb big sf intake ambot stage 1 OTS tune on 91. AMBOT said that mixing 3 gallons of E85 was fine for the tune as long as I fill up the rest with 91 so I did. BUT the E85 I used was in a gas can I've had for about 4-5 months sitting in my garage. Since then about a tank later I...
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