F-150 FX4 5.4L Flowmaster 40 series
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Uploader Comments (k1k31104)
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All Comments (9)
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Sounds good.
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Do you still have the stock cats on?
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is the rest of the exhaust stop before the muffler?
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is the rest of the exhaust stop before the muffler?
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i love the growl :) good vid
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Does it affect the gas mileage any?
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hows it sound cruisin aroun 20-30mph?
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not really but it gives it more power do to the free flow
k1k31104 1 year ago