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JHM Supercharger Kit - B6/B7 S4


This product ships directly from our supplier.


This is the same kit that was featured on JHM's, record setting 2005 B6-S4 4.2L that ran an 11.96 quarter mile at 116 mph.

Features and Specifications:
Our JHM Stage 1 Supercharger Kit for the B6-B7 S4 will make 80 to 100 wheel horsepower over your car's current configuration. Your current modifications, your dynamometer (dyno) used, temperature, elevation, and octane of gas will all effect the exact amount of power gains. Ultimately, the JHM Stage 1 Supercharger Kit is limited by the rods and pistons in a stock engine, so our kit's current configuration in Stage 1 allows you to make the maximum amount of power without significantly shortening the life of your motor. Stage 2 and 3 of our JHM Supercharger Kit will make SIGNIFICANTLY more power but will require a BUILT motor to handle the increased power. Please contact us for more information regarding a Built Motor for your B6-B7 S4.

Our Kit features a Vortech Centrifugal Supercharger Head Unit that is good for up to 800 Horsepower! This head unit is a self contained unit featuring quiet, helical cut gears. The only noise year hear from the blower is at idle and low speeds. At wide open throttle, you hear nothing.

The Kit also comes with our JHM Supercharger Mounting Brackets that we designed and made in-house. These brackets are made from reinforced steel, laser cut, and are powder coated black for a clean installation.

In order to insure the longevity and the durability of the belt and pulleys on the S4, when we made this kit we upgraded the belt and pulleys to a 6 rib system with our JHM 6 Rib Accessory Belt Conversion Kit. This Conversion Kit features 3 JHM Supercharger Kit Specific Pulleys including an Alternator Pulley, a precision Counter Balanced Crank Pulley, and a Supercharger Pulley that produces 6 to 6.5 pounds of boost depending on your exhaust system and other modifications. Furthermore, we also include a JHM Belt Tensioner and Rollers.

Due to the compact engine bay of the V8 S4s, we had to locate the Vortech Supercharger Head Unit off of the Passenger side of the motor, below the headlight. To do this, we had to create a number of different proprietary parts including JHM Supercharger Kit Silicone Inlet and Outlet Hoses. The Inlet Hose is made from reinforced Silicone to prevent collapse under vacuum and takes in air through a JHM Supercharger Kit specific, K&N high-flow, conical air filter.

We also include our new JHM Oil Cooler and Auxiliary Radiator Delete Kit to free up room in the engine bay. This kit includes a custom, CNC machined adapter plate that installs behind the alternator and replaces the OEM Water Cooled adapter. This oil cooler kit is thermostatically controlled with a high-quality Mocal 180 degree F thermostat and includes stainless braided hoses with AN fittings, an upgraded Oil Cooler, Mounting Kit for the Cooler, and an upgraded Power Steering Cooler.

Parts Included:
- Vortech Centrifugal Supercharger (Good for up to 800 Horsepower)
- Set of JHM Laser Cut Supercharger Mounting Brackets
- JHM 6 Rib Pulley Upgrade and Accessory Belt Conversion Set with a JHM 6 Rib Supercharger Kit Specific Supercharger Pulley, a JHM 6 Rib Supercharger Kit Specific Alternator Pulley, and a JHM 6 Rib Supercharger Kit Specific Precision Counterbalanced Crank Pulley
- Belt Tensioner (with Rollers)
- JHM Single Piece Inlet Hose, Made from Reinforced Silicone
- JHM Single Piece Silicone Outlet Hose
- JHM Supercharger Kit Specific Diverter Valve
- JHM Crankcase Ventilation System
- K&N Conical Air Filter
- JHM Oil Cooler and Auxiliary Radiator Delete Kit
- JHM Specified Injectors with 100% Drop-In Fitment
- JHM Stage 1 Supercharger ECU Tune
- Bosch Spark Plugs, JHM Supercharger Kit Specific Based on the Boost Levels of This Kit as Determined by our Research and Development
- JHM A/C Receiver-Drier Relocation Kit that Relocates the Stock Receiver/Drier and includes New Hoses and JHM Modified A/C Lines for easy, bolt-on fitment
- All bolts, hardware, clamps, and miscellaneous items required for a complete kit


  • 2003-2005 B6 S4
  • 2005.5-2008 B7 S4

Please note about fitment:

B6-B7 S4s with an Automatic/Tiptronic Transmission will require an upgraded Transmission Cooler. If you have an Automatic, please select this from the dropdown above.

Air Conditioning Line Core Charge:
We modify 3 of the 4 AC lines on the car to allow for a clean, bolt-on installation. If you would like, we can ship you our JHM Stage 1 Supercharger Kit with modified AC lines for a core charge (see the dropdown below). Once you install the kit and ship your OEM lines back to us, we refund your core charge. If you do not want to incur this core charge, you can send your AC lines to us in advance for modification. Finally, if you plan on removing the AC system from your car entirely, we can omit these items from our kit and discount your price accordingly. Select your preference from the dropdown above.

NOTE: Some Clearancing of Your Vehicle is Required
- The lower quarter of the core support needs to be removed.
- Notching of the bumper support mount points at the frame rail is required.
- Clearancing near the passenger side sway bar mount point is required to accommodate the Silicone Supercharger Inlet Hose.
- On a B7-S4 (2005.5 to 2008), some trimming of the bumper near the factory fog light will be required. In some cases the fog light may need to be shimmed with washers. Even with shimming, it will still fit the factory lower grilles.
- Our kit was originally designed for stock fog light bulbs and stock fog lights on both the B6 and B7 S4. Some aftermarket fog lights may require additional clearancing.

- JHM Oil Cooler Kit: If you have already purchased our JHM Oil Cooler Kit, we can remove these items from your JHM Stage 1 Supercharger Kit and discount the price accordingly. Select your preference with the dropdown above. (We will need to confirm purchase of this part)
- JHM Tuned Software: If you already have JHM Tuned software and have our ECU Calibration for your B6-B7 S4, we will credit you towards the cost of your JHM Stage 1 Supercharger Kit purchase. Select the option that applies to you above. (We will need to confirm purchase of software)
- Flashing Method: With the new, JHM Flashing Server we now have the ability to flash our JHM Stage 1 Supercharger ECU Calibration to your car without removing the ECU. You can either have this done at either our Aberdeen, MD or Lorton, VA shop, OR you can purchase a cable and perform the flash yourself. Select your preference using the dropdown above.

More Information
Brand JHM
Stock Type N/A
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