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Old 06-01-2009, 12:21 AM   #6
TypeS
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Join Date: Jul 2006
Vehicle: 2006 Mustang GT
Location: Florida
Posts: 88
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Some advertise that there is no tune required. I'm pretty sure airaid ( http://www.brenspeed.com/450172.html ) doesn't require one and has some sort of removable insert for running with or without a tune, but in my opinion the tune is 100% worth it even if you continue running on 87 octane.
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