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The stock air box and filter already flow more CFM than the stock throttle body can handle. A cold air intake gains nothing except intake sound. If you get one I would suggest one with a dry filter like AFE.
^^whay he said. If you're after more intake noise there are some options - however don't expect an increase in power or efficiency. Same can be said for a cat-back exhaust.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
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CAI
