2011-2013 Ford F-150 Performance Cold Air Intake Aftermarket K&N 77-2581KP Installation Instructions

2011-2013 Ford F-150 Performance Cold Air Intake Aftermarket K&N 77-2581KP Installation Instructions


This K&N Air Intake System is designed to
increase power and acceleration by reducing restriction in the intake path. K&N 77-2581KP
air intake fits 2011 Ford F-150 pickup trucks with a 5.0 liter engine. Its design utilized
a mandrel bent aluminum tube with a chrome like finish for great looks and smooth airflow.
The 77-2581KP air intake is not legal for highway use in California or other states
adopting California emission standards. Check KNFilters.com for an up to date list of of
models this air intake fits and for a list of other CARB adoption states. K&N power testing
showed an estimated power gain of 10 horsepower at 5,712 RPM with a 77-2581KP air intake installed
on a 2011 Ford F-150 with a 5.0 liter engine. Actual results will vary depending on the
condition of the vehicle, mileage, weather, and other variables. With the air intake installed, we ran the
vehicle on the dyno to test the sound comparison versus the stock intake. The intake system
includes components that have been designed or matched to the needs of these vehicles
to produce a safe horsepower increase. Detailed installation instructions are included with
this kit. The tools needed for this install are shown. Turn off the ignition and disconnect the negative
battery cable. Release the red locking tab and then disconnect the mass air sensor electrical
connection. Rotate the locking tab, then unhook the crank case vent hose from the factory
intake tube. Disconnect the evap hose from the check valve. Loosen the hose clamps securing
the factory intake tube to the throttle body. Release the three clips securing the upper
airbox housing to the lower housing. Then remove the intake tube upper airbox and air
filter from the vehicle. Install the provided edge trim onto the heat shield. Some trimming
of the edge trim will be necessary. Install the filter adapter into the heat shield and
secure it with the provided hardware. Cut the provided edge trim into two nine inch
sections. Install the two nine inch sections of edge trim onto the bottom of the heat shield.
Install the K&N air filter onto the filter adapter and secure it with the provided hose
clamp. Remove the center airbox retaining clip. Install the heat shield filter assembly
onto the lower airbox and secure it with the facory airbox retaining clips. Install the
provided silicone hose onto the throttle body and secure it with the provided hose clamp.
Install the provided silicone hump hose onto the filter adapter and secure it with the
provided hose clamp. Install the provided three-eighth inch hose fitting into the K&N
intake tube. Remove the two screws securing the mass air sensor, then remove it from the
stock intake tube. Install the mass air sensor into the K&N intake tube and secure it with
the provided hardware. Install the K&N intake tube assembly into the silicone hose attached
to the filter adapter, then into the silicone hose on the throttle body. Secure it with
the provided hose clamps. Connect the crank case vent hose with the
quick disconnect fitting on the K&N intake tube. Intall the provided silicone hose onto
the three-eighth inch fitting, intalled in the K&N intake tube. Then attach the open
end to the evap check valve. Reconnect the mass air sensor electrical connection. Reconnect
the vehicles negative battery cable. Double check to make sure everything is tight and
properly positioned before starting the vehicle. It will be necessary for all K&N high flow
intake systems to be checked periodically for realignment, clearance, and tightening
of all connections. Failure to follow the above instructions of proper maintenance may
void warranty. K&N makes products for nearly every vehicle on the road. The K&N website
allows you to search products by vehicle or dimension. Download installation instructions,
view estimated dyno charts showing estimated horsepower gains for this product, and view
product details. For information on where to buy K&N products, go to KNfilters.com

About the Author: Michael Flood

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