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How to Install Airaid Jr. Intake Tube Kit - SynthaMax Dry Filter on your F-150

Installation Time

1 hours

Tools Required
  • Flat Head Screwdriver

INSTALLATION INSTRUCTIONS
#401-941 Modular Intake Tube (MIT)
OR
#401-741 Airaid Jr. Kit
2004-05 Ford F-150 4.6L
(Does Not Fit Heritage Body)

Thank you for purchasing the Airaid Intake System. Please read the instruction manual carefully before proceeding with the installation. Contact Airaid @ (800) 498-6951 8:00 AM - 5:00 PM MST weekdays for questions regarding fit or instructions. Your Airaid Intake System was carefully inspected and packaged. Check that no parts are missing, or were damaged during shipping. If any parts are missing, contact Airaid. The air filter element is protected from direct exposure to water and debris; care should be taken not to drive through deep water. WATER INGESTION IS THE DRIVERS RESPONSIBILTY!​



1. Disconnect negative battery cable. Disconnect valve cover breather hose from factory intake tube and valve cover.


2. Loosen hose clamps connecting the factory intake tube to the air filter assembly and throttle body.


3. Remove the factory intake tube assembly from engine.

4. Airaid Jr. Kit PN#401-741
If you purchased the Airaid Jr. Kit PN#401-741, replace the factory air filter with the Airaid Premium filter included with the kit.


5. Install the supplied urethane
hump hose and two #80 hose
clamps on factory air filter
assembly. Leave hose clamps
loose until final assembly.


6. Install supplied silicone
reducer on end of throttle
body. Install #48 hose clamp
on small end of the reducer and
#56 hose clamp on the big end
of the reducer. Leave hose
clamps loose until final
assembly.


7. Install the Airaid Modular
Intake Tube on engine.


8. Tighten hose clamps on both
ends of the Modular Intake
Tube.


9. Install the supplied rubber hose
on the Modular Intake Tube.
Connect the other end of the
hose to the valve cover.
Secure both ends of the hose
with the supplied speed
clamps.


10. Double check your work to be
certain that all nuts, bolts, and
clamps are securely fastened.
Reconnect the negative
battery cable.


Before


After


Synthamax Air Filters do not require oil. Service air filter as needed by cleaning with common non-petroleum all-purpose household cleaner and water. Simple Green®, Formula 409® or equivalent works great. Apply cleaner to outside of air filter and allow to soak. Then flush filter clean from the inside out with a garden hose and repeat steps if necessary. Do not apply high pressure water or air to clean filter. Allow filter to air dry and reinstall.