INSTALL MANUAL: Gen III & Gen IV 4Dr Explorer/Mountaineer

The following Installation Instructions apply to the 2002-2005 Ford Explorer 4-Door 4.0L SOHC models. CAUTION: This manual is still under construction! Prior to proceeding, confirm that your engine bay looks similar to the following photo:



You should read the entire instruction manual prior to proceeding with your installation.

It is important to familiarize yourself with the ModdBox Supercharger Kit installation.  It is the responsibility of the installer to properly install the Supercharger Kit.  To ensure safety and proper installation, ModdBox recommends that this product only be installed by a qualified professional with access to pneumatic tools and a strong familiarity with automotive service procedures.


91 or higher octane gasoline is required at all times.

You must use fuel of 91 octane or higher.  If your vehicle is not currently running 91 or higher octane, you must run your vehicle till empty and refill with the required octane at least 2 times prior to installation.


Any previously installed aftermarket tuning equipment must be removed and the vehicle returned to an as stock condition before installing the supercharger.

Any equipment that directly modifies the fuel mixture or ignition timing of the engine can cause severe engine damage if used in conjunction with the ModdBox Supercharger Kit. This includes, but is not limited to ignition boxes, air/fuel controllers, OBDII programmers, and any other device that modifies signals to and/or from the ECU. Aftermarket bolt-on equipment such as underdrive pulleys may conflict with the operation of the supercharger and must be removed prior to installation. Use of any of these products with the ModdBox Supercharger Kit could result in severe engine damage.





EGR – Exhaust Gas Recirculation

HVAC – Heating Ventilation & Air Conditioning

IAC – Idle Air Control

MAF – Mass Air Flow

TPS – Throttle Position Sensor

Vac – Vacuum





Standard metric socket set

Hex key set

Various pliers

T-30 Torx bit

Fluid funnel

Oil pan

Flat head screw driver

Pneumatic or electric hammer drill

Crescent wrench

Utility knife

Shop vacuum

Rat tail file

Propane torch or similar heating device





… installation manual under construction.  Please contact us for more details.  Refer to the below link for similar procedure:

INSTALL MANUAL: Ranger/B4000, 2Dr Explorer, & GEN1 Sport Trac


Thank you for choosing Moddbox!  We would love to hear how we can make this installation manual better.  If you feel we could improve the installation manual in any way, please let us know by emailing us at [email protected].

Submit your build photos!  We love seeing your builds.  Please submit your Name, State/Province, and some photos of your vehicle and we will add you to our customer build section.