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Ford sends them in a package of 4 but the dealer opened the package and sold me just one of them. The dealer was Huntersville Ford in North Carolina so they still have 3 in stock if your interested.
Does this tube restrict flow thus causing power loss?? If not why should it be removed?
No it does not restrict any type of flow. It was designed so that you would hear the noise of the intake when you step on the gas. I personally did not want to hear it I would rather just listen to the exhaust and not the stupid intake air being sucked in. After installing it I can tell you it's alot quieter in the cab of the car and way more enjoyable now.
How do you cap off the hole in the factory CAI when you remove the hose? Does it use the same sized grommet as the firewall?
No you can not just cap it off. I just left the tube lying in the engine bay for now until I get a JLT intake since it does have this tube coming off of it.