DeatschWerksFPHWK-10-HD Heavy-Duty Fuel Pump Hardwire Kit (40A)

Vehicle Fitment

• Universal - compatible with most high-flow in-tank fuel pumps

Features

• High-current hardwire kit to reliably power fuel pump from battery
• 40-amp automotive relay included
• 30-amp ATO inline fuse for circuit protection
• 15' of 10 AWG power cable
• 6' of 10 AWG ground wire
• 4-lead relay socket with color-coded pigtails
• Nylon expanding loom for clean, protected routing
• Designed for high-demand setups - especially older vehicles or builds with > 800 whp

Specifications

• Part Number: FPHWK-10-HD
• Power Wire: 15', 10 AWG SLX automotive wire
• Ground Wire: 6', 10 AWG SLX automotive wire
• Relay Rating: 40 A Bosch-style
• Inline Fuse: 30 A ATO
• Harness Cover: Nylon expanding loom
• Connection: Universal, single fuel pump

Included Components

• 1x 40 A relay
• 1x relay socket (4-lead, color-coded)
• 15' 10 AWG power wire
• 6' 10 AWG ground wire
• 1x 30 A ATO inline fuse
• Nylon expanding loom for wire protection
• Installation instructions

Product Description

The DeatschWerks FPHWK-10-HD is a heavy-duty hardwire kit designed to provide clean, reliable power directly from the battery to a high-flow fuel pump. This is especially valuable in high-performance builds or older vehicles where factory wiring may struggle to supply adequate voltage under load. With 15 feet of 10 AWG power cable and a 40 amp relay, this kit ensures that your pump receives maximum voltage without overheating or voltage drop.

Its durable components - such as the nylon loom, heavy-gauge wires, and inline fuse - make it suitable for demanding applications. The 30 A ATO fuse adds safety by protecting the wiring from overload, while the color-coded relay socket simplifies installation. Whether you're running a single high-flow DW pump or building a high-horsepower setup, this harness helps you maintain stable, high-power fuel delivery.

Ideal use cases include aged vehicles (10+ years), race builds making significant power, or any scenario where boosting fuel pump performance is limited by existing wiring. When paired with the right pump and proper wiring, the FPHWK-10-HD helps unlock the full potential of DeatschWerks fuel system components.