Maximum Wiring Flexibility for Your Link ECU Installation

Building a custom standalone harness and need additional wiring length?

The Link ECU B Loom Long (5LB) gives you a 5-meter pre-terminated flying-lead loom for compatible Link ECUs, making it easier to build a clean custom harness without extending dozens of individual wires.

With the ECU connector already terminated, you can concentrate on routing and terminating the other end specifically for your vehicle.

Whether you're wiring a street car, engine swap, drag car, or full motorsport build, the 5LB gives you the length and flexibility needed for more complex installations.

Why Choose the 5-Meter B Loom?

ECU location can make or break a clean wiring installation.

If you're mounting your Link ECU inside the cabin, behind the dashboard, in an electronics enclosure, or farther away from the engine, a short loom can quickly become a problem.

The 5LB provides 5 meters of wire, allowing you to route the harness properly instead of adding extensions and unnecessary splices later.

More length means more freedom to build the harness around the car—not the other way around.

Pre-Terminated ECU Connector

The ECU side of the B Loom comes pre-terminated with the appropriate connector, eliminating the need to individually crimp and insert every ECU terminal.

The opposite end provides flying leads ready to be:

• Cut to length
• Routed through the vehicle
• Spliced where appropriate
• Terminated into sensor connectors
• Connected to relays and solenoids
• Integrated into your custom engine harness

This makes the 5LB an excellent starting point for professional standalone wiring.

Expand Your Link ECU Installation

On compatible Link ECUs, the B connector provides access to additional ECU inputs and outputs.

Depending on your specific ECU, these circuits may be used for functions such as:

• Additional analog sensors
• Fuel pressure
• Oil pressure
• Coolant pressure
• Additional temperature sensors
• Flex-fuel / ethanol-content sensor
• Boost control
• VVT/VTC control
• Fuel pump control
• Cooling fans
• Launch-control inputs
• Switch inputs
• Auxiliary outputs
• Relays and solenoids
• Motorsport functions
• Engine protection strategies

Available functions and pin assignments depend on the specific Link ECU being used.

Perfect for Custom & Motorsport Harnesses

The Link ECU B Loom Long is ideal for:

• Custom standalone ECU installations
• Engine swaps
• K20/K24 builds
• Honda and Acura applications
• GM and LS swaps
• Nissan and Infiniti builds
• BMW performance builds
• Turbocharged applications
• Drag cars
• Road-race cars
• Time-attack builds
• Dedicated race vehicles

Why Start With a Pre-Terminated Loom?

Building an ECU harness completely from scratch means sourcing the correct connector housing, terminals, seals, wire, and specialized crimping equipment.

The 5LB eliminates much of that work by providing a professionally pre-terminated ECU connector with long flying leads ready for your application.

The result is a faster and cleaner starting point for your custom harness.

Key Features

• Genuine Link ECU B Loom Long
• Link part number: 5LB
• 5-meter loom length
• Pre-terminated ECU connector
• Color-coded flying leads
• Designed for compatible Link ECUs
• Excellent for custom engine harnesses
• Ideal for remotely mounted ECUs
• Provides extensive routing flexibility
• Reduces the need for wire extensions
• Great for engine swaps
• Suitable for street and motorsport applications

A Loom vs. B Loom

The A Loom and B Loom are not interchangeable.

On Link ECUs equipped with both connectors, each loom provides access to different ECU pins and functions.

If your installation requires both ECU connectors, you may need an A Loom and B Loom to complete the harness.

For installations requiring maximum wiring length, pair the B Loom Long (5LB) with the compatible A Loom Long (5LA).

Build Your Harness Without Running Out of Wire

When you're spending the time to build a professional standalone engine harness, the last thing you want is to discover that your wiring is too short after you've already started routing it.

The Link ECU B Loom Long (5LB) gives you 5 meters of wiring and a pre-terminated ECU connector, providing the flexibility needed to build the harness properly from the beginning.

More length. Fewer unnecessary splices. Cleaner custom wiring.

Important Compatibility Note

Link ECU models use different connector and pin configurations. Verify that the 5LB B Loom Long is compatible with your specific Link ECU before ordering. Always follow the official wiring diagram and pinout for your ECU when constructing or modifying an engine harness.