2021+ F150 INTAKE MANIFOLD ADAPTERS FOR GEN 3 MUSTANG INTAKE MANIFOLD INSTALLATION

!!!!!!!!!!WE HAVE TRIED TO MAKE THESE INSTRUCTIONS AS COMPLETE AND THOROUGH AS POSSIBLE.  PLEASE READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE CONTINUING WITH THE INSTALL.  IF YOU ARE UNSURE OF ANYTHING, PLEASE DISCONTINUE INSTALLATION AND CONSULT/HIRE A PROFESSIONAL TO COMPLETE THE INSTALLATION.   IT IS THE INSTALLER’S RESPONSIBILITY TO VERIFY THE SUITABILITY OF THIS PRODUCT FOR A PARTICULAR INSTALLATON. THERE IS NO ASSUMED LIABILITY FOR USE OF THIS PRODUCT!!!!!!!!!!!!!!!!

Before starting, it is strongly recommended to let vehicle cool down.  

Fuel System Pressure Release

Pressure release

With the vehicle in NEUTRAL, position it on a hoist.

NOTE: The Fuel Pump driver Module is located on the frame rail above the fuel tank.
Disconnect the fuel pump driver module electrical connector.

Start the engine and allow it to idle until it stalls.

After the engine stalls, crank the engine for approximately 5 seconds to make sure the fuel rail pressure has been released.

Turn the ignition switch to the OFF position.

Disconnect the battery ground cable.

Position aside the coolant tube. Disconnect and position aside the brake booster tube and the crankcase ventilation tube. Loosen the 2 clamps and remove the air cleaner outlet pipe.

Remove the crankcase vent tube.

1. Disconnect the fuel supply tube.

2. Disconnect the fuel jumper tube.

Remove the fuel rail insulators.

Disconnect the throttle body electrical connector.

Disconnect the LH fuel injector harness and fuel pressure sensor electrical connectors.

Disconnect the RH fuel injector electrical connectors and the fuel sensor electrical connector.

!!!!!!!!!!!!!!!!!!!!!!IT IS STRONGLY RECOMMENDED TO USE AN AIR NOZZLE TO BLOW DEBRIS AWAY FROM FUEL INJECTORS AND MANIFOLD BASE TO HELP PREVENT ANY DEBRIS FROM FALLING INTO INTAKE PORTS ON CYLINDER HEADS WHEN FUEL INJECTORS AND MANIFOLD ARE REMOVED!!!!!!!!!!!!!!!!!

Remove the fuel rail bolts.

While it is not strictly necessary to remove fuel rails at this time, it may make removing the intake manifold easier.

1. Loosen the intake manifold bolts.

2. Position the manifold up and towards the front of the engine to access the rear of the manifold.

• Disconnect the MAP sensor electrical connector.

• Detach the wiring harness retainers

• Remove the intake manifold.

NOTE: Visually inspect the manifold gaskets for nicks, cuts and abrasions. If these conditions are NOT present, the gaskets may be re-used.

Remove and inspect the gaskets.

If gaskets are damaged or deemed unsuitable for reinstall, they can usually be obtained locally at most auto parts stores.  

It is recommended to stuff clean rags into the intake ports while cleaning the sealing surfaces of the cylinder heads.

Clean sealing surfaces of the cylinder heads.

Install the previously removed intake manifold gaskets into the adapters.

Remove rags from intake ports in cylinder heads.

Place adapters on the appropriate sides of engine, and using a 4mm hex key start each of the captive screws in the adapters several turns each, but do not tighten down at this time.  After each of the 4 captive screws have been started, start a 20mm low profile SHCS in the open hole in each of the adapters.  Once all screws have been started, torque down to 89 in/lbs by starting in the center hole, and leap frogging back and forth until all screws have been tightened.  Repeat torque sequence.  

Connect the MAP sensor extension  harness to the OEM connector at the rear of the engine, and route the harness through the engine valley towards the front of the engine.  Make sure the harness will not get pinched or snagged.  

Test fit your Gen 3 manifold to the adapters.  We have found that there are 2 spots that typically need shaving down for proper clearance.  One is where the back bolt on the passenger side of the manifold is, and the other is where the middle bolt on the driver side of the manifold.  See pictures for reference.  Shave as needed until you have a good fit.  

The next pic shows the manifold clearanced.  Make sure to take all precautions to prevent debris from entering the manifold.

Shown with clearance on passenger side.  

Shown with clearance on driver side.

With the manifold properly fitting, make sure all 8 orings are properly installed, place manifold on adaptes, and start the 6 manifold bolts, but do not tighten down fully at this time.  

Place the fuel rail stand offs in place on the manifold, with the slot/groove oriented towards the outside.  You can help line them up by using the OEM fuel rail bolts as an alignment tool by starting the bolt in the adapters before fully pushing the stand offs down in the manifold.  

Once the stand offs are in place, you can fully tighten the intake manifold bolts in two stages by following the sequence in the picture

Stage 1:  102 lb.in (11.5 Nm)

           Stage 2:  35°

Before installing the fuel rails back to the intake manifold, make sure the orings are clean and free from debris.

Install fuel rails to intake manifold

Install the 85mm SHCS bolts through the fuel rails and into the adapters.  Tighten to 89 in/lbs.

Reconnect the fuel lines to the fuel rails

Reconnect the electrical connectors to the fuel injector harnesses.

Reconnect the fuel rail pressure sensor.

Remove the MAP sensor from the OEM intake manifold

Install MAP sensor to the throttle body adapter using the 16mm SHCS.

Install throttle body adapter to intake manifold using the 20mm SHCS.  Tighten evenly.

Connect MAP sensor extension harness to MAP sensor.  Tuck any extra harness back and zip tie out of the way.  

Install provided throttle body gasket to the adapter.  

Install throttle body to adapter plate using OEM hardware.

Reconnect the evap line to the manifold, reconnect the evap line to the solenoid.  Plug evap solenoid back in.  

Reconnect intake tube and air box top.  Tighten clamps.  Reconnect coolant line if disconnected during install.  Plug throttle body connector back in.

Reconnect valve cover breather hoses.  The passenger side hose will need to be modified to fit without kinking.  Typically you can do this by removing the 90 end by slitting the plastic as shown.  Connect the intact end to the manifold,  and cut to length needed to be able to reach the breather connection.  Heat the cut end carefully using a heat gun or similar until you can push the 90 degree fitting in.  Let cool before installing.  

Cap off any open/unused ports on the intake manifold.  Typically the 2 shown below.  Caps are not included with the kit at this time.  They can be sourced at any local auto parts store.

Double check to make sure all hoses, connectors, clamps are connected and tightened properly.