K&N's 77-2617KC is a cold air intake kit for the Ford F-150 V6 with an aluminum intake tube. It includes a high-flow tube, a custom heat shield, and an oversized washable cotton air filter. The kit replaces the factory air box, and the manufacturer lists a replacement filter of RU-6104. The main reason to choose it over stock is airflow. The manufacturer estimates 21.44 HP @ 4489 RPM and about 20.7 lb-ft of torque. Owners on user forums are more skeptical. One poster on a forum for the stock setup calls it a very good intake in most respects, except sound and appearance. Buy this kit for the tube, filter, and sound, not for a big power jump.
Verify fitment before you order. Manufacturer pages vary on coverage, so the intake is designed to replace the restrictive OEM air box and should be matched to your exact engine and model year. Installation is a DIY job. The manufacturer says it installs in about 60 minutes and will not void the factory warranty. Search terms this kit matches include 2015 F-150 3.5L cold air intake, 77-2617KC install, F-150 EcoBoost cold air intake, and washable cotton gauze air filter.
The manufacturer states that the intake will not void your factory warranty.
The manufacturer recommends that customers do not discard the factory air intake, so store it in case you return to the stock setup.
Owners on user forums warn against soaking the filter. Excess oil can get onto the intake air temperature sensor and damage it, so use only a light, even coat.
The manufacturer's instruction sheet starts by having you turn off the ignition and disconnect the negative battery cable. Write down radio presets first, because disconnecting the battery erases stored memory settings and some radios require an anti-theft code. Next, release the clips on the factory filter housing and remove it. Then secure the heat shield to the lower factory housing with the factory clips. The IAT sensor moves from the factory tube to the K&N tube with its O-ring and the supplied grommet, and the manufacturer warns that the sensor is fragile. Connect the provided couplers to the turbo inlet tubes, reconnect the battery, and check all clamps before starting. The manufacturer warns that skipping steps or not using the supplied hardware may damage the intake tube, throttle body, or engine.
