Ford Truck Enthusiasts Forums - View Single Post - 4 Inch Flo Pro Exhaust System from $359
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Old 09-17-2012, 01:32 PM
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sounds better with twister installed

Here are some dyno numbers with this Flo Pro 4 inch system over stock on 87 octane , our truck is a 2012 eb f150 with 373 gears

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