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JHM Fuel Pump Upgrade Kit, High-Flow 340 LPH w High Volume Fuel Filter for B6 A4-S4 and EARLY B7 S4



JH Motorsports is pleased to now offer our High-Flow 340 LPH (Liter Per-Hour) In-tank Fuel Pump Upgrade Kit with our NEW High Flow Fuel Filter for the B6 A4-S4 and EARLY B7-S4!

For years there has been a lack of complete aftermarket fuel pump kits due to the factory fuel filter regulator assembly not being able to regulate the high volume of fuel that upgraded pumps provide. This is why we include our JHM Specific - High Volume Fuel Filter with our JHM Fuel Pump Upgrade Kits.

The issue with factory and replacement fuel filters is that the fuel regulator is not able to accept the high volume of fuel when at low speeds and at idle when the car isn't using as much fuel (as apposed to WOT) and the fuel pressures rise above the regulator specifications causing the fuel to not be able to return to the tank fast enough. This can cause fuel trim and other fuel related issues. Our High Flow Fuel Filter has a redesigned regulator to prevent these issues from occurring.

Here is a Fuel Pump Comparison Between the JHM 340LPH, JHM 255LPH, Bosch 044, Walbro 255, and OEM B6 and Early B7 S4. Note: The fuel systems on the B6 A4-S4 and Early B7-S4 run at 4bar.

Click to enlarge picture

NOTE: Due to the design of the OEM Fuel System, aftermarket pumps are not able to utilize the check valve at the bottom of the basket that would normally keep fuel in the basket when fuel level is low (roughly 30 DTE) and under hard acceleration when the fuel momentarily sloshes to the back of the fuel tank. This is only a minor inconvenience when you are low on fuel.

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This product fits the following vehicles:
Make Model Chassis Engine
Audi S4 B6 (2003-2005) 4.2l V8 40v
Audi S4 B7 (2005.5-2009) 4.2l V8 40v
Audi A4 B6 (2002-2005) all
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Off-road Use

By Purchasing any Off-Road use ONLY products from JH Motorsports, Inc. I acknowledge and understand the following disclosure. (This notice is located at the bottom of the page description of affected products on our website.)

Vehicle Code § 27156:
(b) No person shall operate or leave standing upon a highway a motor vehicle that is required to be equipped with a motor vehicle pollution control device under Part 5 (commencing with Section 43000) of Division 26 of the Health and Safety Code or any other certified motor vehicle pollution control device required by any other state law or any rule or regulation adopted pursuant to that law, or required to be equipped with a motor vehicle pollution control device pursuant to the National Emission Standards Act (42 U.S.C. Secs. 7521 to 7550, inclusive) and the standards and regulations adopted pursuant to that federal act, unless the motor vehicle is equipped with the required motor vehicle pollution control device that is correctly installed and in operating condition. No person shall disconnect, modify, or alter any such required device.
(c) No person shall install, sell, offer for sale, or advertise any device, apparatus, or mechanism intended for use with, or as a part of, a required motor vehicle pollution control device or system that alters or modifies the original design or performance of the motor vehicle pollution control device or system.

Health and Safety Code § 43000:
43001. The provisions of this part shall not apply to:
(a) Racing vehicles.

As the aforementioned code sections outline, it is against the law to operate or use a vehicle on public streets or highways with modified, altered, or disconnected motor vehicle pollution control devices. This may include but is not limited to, Evaporative Fuel Controls, Catalysts, DPF, PTOX, PCV Systems, Exhaust Gas Recirculation Systems, Oxygen Sensors, Thermostatic Air Cleaners, Air Intake Systems, Fuel Injectors, Regulators, Adjustable Cam Gears, ECU Programming, Mapping, or other Computer Modifications. Air Pumps, Air Injection, Timing, and any other Emission System Modification(s).

Purchaser acknowledges and certifies to JH Motorsports Inc., that Purchasers vehicle will only be used for racing applications or off road vehicle use only. Purchaser requests these modifications for the purpose of enhancing the vehicle for competitive Racing Applications and will not use this vehicle on public streets or highways. Purchaser agrees to indemnify JH Motorsports Inc., all employees, officers, owners, and subsidiaries for any civil or criminal liability arising out of use of Purchasers vehicle on public streets or highways as Purchaser has been duly notified of the laws and regulations regarding disconnecting, alteration, or modification of a vehicle’s pollution control devices. Purchaser understands and has been advised the driving of a vehicle on public streets or highways could result in criminal or civil penalties.

Prop 65

Warning: This product may contain a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm.

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Q and A

Product Questions

Is this set up/kit E85 compatible??
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