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Braided Kevlar Fuel Line Re-Route Kit (JHM) for D4 A8-S8 4.0T



Sale Price $280.46


 Elevate your Audi D4 A8-S8 4.0T's performance with our Kevlar Braided Fuel Line Kit, ensuring efficient fuel delivery through a direct route to each high-pressure fuel pump.


Why do you need this product?  We manufactured this product to address the inherent flaws in the OEM fuel system design. As demands for increased flow from your vehicle's fuel system grow, the limitations of the factory setup become apparent, leading to fuel starvation issues. The factory configuration employs high-pressure fuel pumps in series, resulting in pressure imbalances and uneven fuel distribution from Cylinder 1 to Cylinder 8. This imbalance can lead to fuel starvation, particularly in Cylinder 8 of the 4.0t engine.


The JHM Braided Kevlar Fuel Line Re-Route Kit resolves this issue by transitioning the fuel system to a parallel setup, ensuring both pumps receive an equal amount of fuel simultaneously. By doing so, we eliminate the common problem of fuel starvation in Cylinder 8, optimizing engine for performance and reliability.


This upgrade offers:

  • Improved Fuel Flow: Bypass the limitations of the factory setup with a more direct route to each high-pressure fuel pump, enhancing fuel flow.

  • Quick Installation: Swift and hassle-free installation with included fittings, eliminating the need for complex modifications and minimizing downtime.

  • E85 Compatibility: Crafted with PTFE (Teflon) lines, this upgrade supports both ethanol (E85) and gasoline, providing versatility in fuel options.

  • Kevlar Outer Braided: The lightweight woven Kevlar outer braid not only ensures exceptional durability and flexibility but also reduces the overall weight.


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This product fits the following vehicles:
Make Model Chassis Engine
Audi A8 D4-D4.5 (2011-Present) 4.0t V8 32v
Audi S8 D4-D4.5 (2013-Present) 4.0t V8 32v
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You're reviewing: Braided Kevlar Fuel Line Re-Route Kit (JHM) for D4 A8-S8 4.0T
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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