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Hello. Im currently running my car with 89 oct tune. I want to change the tune to 91 or 93, What i need to do for it. Do i need reset original backup then load 91 oct tune, or just connect predator and start load 91 oct tune without reseting 89 on car. Please tell me right steps. Thank you.


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Make sure your running the right octane for the tune or you'll get knock...
 
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