How to Install Injen Power-Flow Cold Air Intake - Polished on your F-150

Complete stock intake shown. Disconnect battery before install.

A) Loosen clamp on throttle body using 8mm nut driver. B) Disconnect the MAF sensor harness.

Un-clip the 3 clips holding in upper half of air box and slide back.

Now, lift and remove the whole intake assembly out of vehicle.

Loosen the four bolts holding in the resonator tube. Note: 1 bolt located under the resonator.

Disconnect the crank case line from stock fitting on intake resonator tube.

Now, lift and remove the resonator tube out of vehicle.

Once removed, disconnect the crank case line, re-position for the line to sit on the other side of A/C line. Note: You will re-use this line and it will connect to the new injen intake system.

With 13mm socket and extension, loosen the bolt on side of air box housing.

Remove bolt and save for later install.

With t20 torx bit, loosen and remove the 2 screws holding in the MAF sensor.

Carefully pull the MAF sensor out and set aside.

Install the 4” velocity adaptor tot he inside of the heat shield.

Secure the adaptor using the provided M6 button head screws and tighten using allen key.

Attach the vinyl trim to the side of the heat shield.

Attach the other vinyl trim to the side with tabs. Note: make sure you attach the trim to heat shield to prevent rubbing and vibration.

Install the filter to the adaptor and tighten using 8mm nut driver.

Install the heat shield assembly into the vehicle and position tab side first.

Make sure the heat shield assembly with trim seats in the groove. Position heat shield forward for the tab to align with hole from step 11. Align the tabs to clips.

Secure the tab using the bolt from step12.

Secure the heat shield and clip to tabs.

Tighten the bolt using 13mm socket and ratchet. Make sure the heat shield assembly is tight and secure.

Install the MAF sensor into the new injen intake tube.

Secure the MAF sensor using provided M4 button head screws and tighten using 2.5mm allen key.

With clamps provided, attach to the straight hose and install to the throttle body.

Install the hump hose with clamps to the tube, Do not tighten.

Install the intake tube into the vehicle and position to the throttle body and adaptor.

Slide the hump hose on to the adaptor and position.

Now tighten the clamps on throttle body using 8mm nut driver.

Tighten the clamps on the hump hose using 8mm nut driver.

Re-connect the MAF sensor harness.

Re-connect the crank case line to the fitting on the new injen intake tube.

Check the entire system for the best possible fit. Once you have checked the entire system for leaks, rubbing or rattling, continue to tighten all nuts, bolts and clamps. Reconnect the negative battery terminal prior to starting the engine.

Congratulations! You have just completed the installation of the best engineered intake system, featuring Web Nano-fiber dry filter. Periodically, check the system for fitment, this will enhance the life of your Power-Flow system.