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JHM Lightweight Battery Relocation Kit (w/ Battery) for B6-B7 A4-S4

SKU: JHM-B67BattRelo



**Introducing the JHM Lightweight Battery Relocation Kit for the B6-B7 S4 and A4!!!**


This has been a project that we have had conceptualized and built for several years now. The development of our Air to Water Intercooler setup for our V8 Supercharger Kits forced us to get these kits to market. Now you can reap the benefits from our extensive research and development for the B6-B7 S4 and B7-RS4 and get this kit on your car!


This Battery Relocation Kit comes with everything you need to replace your incredibly heavy, OEM battery with a lightweight battery and relocate it to the trunk of your B6-B7 S4 or A4. This kit will fit ANY B6 or B7 A4 or S4. Depending on the battery currently in your car (OEM or replacement "brand-x" lead-acid battery with a lower CCA rating than stock), our Lightweight Battery Kit will net you a weight savings of anywhere from 17.5 pounds to 27 pounds. **NOTE: JHM has seen a wide range of batteries on the B6-B7 chassis cars that can weigh anywhere from 45 to 60 lbs. Additionally, relocating your battery to the rear of the car in the spare tire well gives you a better front to rear weight distribution allowing for better handling performance.


You can use the JHM Lightweight Battery Relocation Kit to install almost any battery in the trunk of your car. We selected the Optima Yellow Top battery because it provided the best compromise between weight loss and daily drivability. We have used this kit to run MUCH lighter batteries but if you're not driving on the highway for extended periods of time, these smaller batteries may not accommodate your daily driving needs.


We have the battery located in the spare tire well of the trunk. This puts the weight of the battery as low as possible in the car in order to achieve the most improvement in handling. However, our kit allows for some customization and gives you the ability to mount a lightweight battery almost anywhere in the trunk. Mounting the battery in the spare tire well does eliminate the ability to put a spare tire in your car. Since our JHM Lightweight Battery kit emulates the OEM battery setup of the RS4, we also decided to adopt Audi's OEM spare tire replacement strategy - but at a non-OEM price! We recommend purchasing a "Slime" based emergency tire repair kit (a "poor man's" version of the OEM Kit in the RS4). These can be found in the "Tools and Cables" section of our store or by searching our website for "Replacement Spare Tire Kit".


- Weight savings of up to 27 pounds.
- Better front to rear weight distribution for increased handling performance
- Purchasing this kit gets you one of the key components of the Air to Water Intercooler Kit required in our Supercharger Kits allowing for easier upgrading in the future.


- 1x Lightweight Battery, Optima Yellow Top - Group 51R
- 1x Positive Battery Cable (pre-crimped and pre-cut) for routing to trunk
- 1x Negative-Ground Battery Cable (pre-crimped and pre-cut)
- 1x JHM Positive Cable Junction Block with mounting hardware (no cutting of factory cable!)
- 1x JHM Battery Strap for Optima Yellow Top Batteries with mounting harware
- 6x Cable straps for securing battery cables
- Also included, extra mounting kit parts and tray for larger batteries


- For some installation notes and a set of labeled pictures detailing the installation of this kit, please click HERE
- NOTE: If you plan on using this kit to install a lead acid battery, you must have the battery in a sealed box and vent the box to the outside of the vehicle. If you are using this Battery Relocation Kit in a race car, please check with your racing sanctioning body for the exact rules and safety requirements for battery boxes.




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This product fits the following vehicles:
Make Model Chassis Engine
Audi S4 B6 (2003-2005) 4.2l V8 40v
Audi A4 B7 (2005.5-2009) all
Audi A4 B6 (2002-2005) all
Audi S4 B7 (2005.5-2009) 4.2l V8 40v
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You're reviewing: JHM Lightweight Battery Relocation Kit (w/ Battery) for B6-B7 A4-S4
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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