Rywire K24 Swap Engine Harness for Haltech Nexus S2/S3/R3, 4 Injector - K-Series (K2-Haltech-NA)

Rywire K2-Haltech-NA is the four-injector K24 swap harness for Haltech Nexus S2, S3 and R3 computers. It drops the secondary injectors, exhaust back pressure sensor and boost solenoid plug of the eight-injector version and uses an 8-pin engine-bay AUX connector. The sensors, coils and injectors plug straight in, the AUX and CAN ports leave room for flex fuel, drive-by-wire or extra sensors later, and the interior side is a separate chassis adapter.

Why This K24 Swap Harness for Your Haltech Nexus Build

Rywire K2-Haltech-NA is a pre-terminated K24 swap harness for the Haltech Nexus S2, S3 or R3: the K24 sensors, coils and 4 injectors plug in, and a separate chassis adapter connects it to your car.

• Versus re-pinning your factory Honda harness: This Rywire K24 Haltech Nexus 4-injector harness is built for the Haltech plug, with wideband, CAN and AEM sensors wired in; factory harnesses suit Honda computers.
• Versus a Haltech flying-lead harness you terminate yourself: Flying leads suit one-off builds, and Tuned By Shawn sells them. This Rywire K24 Haltech Nexus 4-injector harness arrives with every K24 plug terminated.
• Versus the factory computer: This Rywire K24 Haltech Nexus 4-injector harness wires in powered CAN, an LSU 4.9 or CAN wideband, AEM oil temperature, oil pressure and fuel pressure, and flex-fuel-ready AUX inputs.
• Four-injector layout: This Rywire K24 Haltech Nexus 4-injector harness leaves out the secondary injector bank, exhaust back pressure sensor and boost solenoid plug, and uses a smaller 8-pin engine-bay AUX plug, so nothing sits unused.
• Separate chassis adapter: The interior side of this Rywire K24 Haltech Nexus 4-injector harness is its own adapter. Moving the engine to another chassis means a new adapter, not a new harness.
• Tuned with Haltech: Tuned By Shawn tunes Haltech, so we can help match this Rywire K24 Haltech Nexus 4-injector harness to your computer and tune.

Best for: K24 swaps on Haltech Nexus S2/S3/R3 with 4 injectors. Elite: K24 Elite 4-injector version. K20: K20 Nexus 4-injector version. Boost or 8 injectors: K24 Nexus 8-injector version.

Engine Swap Fitment

• Honda K-series K24 engines (K24 crank sensor plug, Bosch knock sensor plug)
• Plug-in chassis adapters for 1984-2000 Civic, 1984-1991 CRX, 1990-2001 Integra, 2002-2004 RSX and EP3 Civic Si, 1987-1991 Prelude and 2000-2005 S2000
• Any other chassis, sand rail, buggy, gutted circuit car or drag car through the Rywire Race Fuse/Relay Box V3 or a custom interior side
• Engine computer: Haltech Nexus S2, Haltech Nexus S3, Haltech Nexus R3, Haltech Elite 2500, Haltech Elite 1500 or Haltech Elite 750

Features

• Fully pre-terminated K-Series race loom: the sensors, coils and injectors plug straight in
• 4-injector layout
• Wideband: Bosch LSU 4.9 sensor plug, or lambda over CAN, depending on the computer
• Programming connection: Ethernet or USB, depending on the computer
• Powered CAN bus for loggers, dashes and gauges
• 8-pin engine-bay AUX expansion with power, 5V, sensor ground, CAN and 6 analog/digital inputs
• 5-pin cabin AUX expansion with 5V, sensor ground and 3 analog/digital inputs
• Flex fuel ready: wire the Rywire flex fuel kit into the AUX connector
• Drive-by-wire ready: Rywire can build an AUX expansion for the DBW throttle body and pedal
• Interior side is a separate chassis adapter, so the engine harness can move to another chassis
• Built to order by Rywire in the USA

Connector List

• Engine computer plug: Haltech Elite 1000 and up
• Throttle position (TPS) and coolant temperature (ECT): factory Honda K-Series
• VTEC solenoid and reverse lights: factory Honda (2002 and later style)
• Vehicle speed sensor: factory Honda K-Series hydraulic transmission style
• Starter trigger: factory Honda
• Ignition: factory Honda K-series smart coils, with ground ring terminals for the coils and computer
• Knock sensor: Bosch 0261231188 two-wire (EV1-style plug)
• Alternator: factory Honda, OBD0/OBD1 or OBD2 plug (OBD2 by default)
• Injectors: 4 outputs, Bosch EV14 plugs by default (ID 1050X style)
• Cam/crank trigger: factory Honda K-series RSX (2002 and later)
• Air temperature: AEM 30-2014
• Oil temperature: AEM 30-2013
• Fuel pressure: AEM 30-2130-100
• Oil pressure: AEM 30-2130-150
• Manifold pressure (MAP): AEM 30-2130-50 or 30-2130-75

Choosing Options

• Chassis Adapter: the interior side of the harness. Pick your chassis to get a plug-in adapter for that car, the Race Fuse/Relay Box V3 (with or without the Rywire Switch Panel) for a race car, sand rail or gutted chassis, Rywire PDM System if you run a Rywire chassis harness with PDM, or Other / Custom / Race-Style for a one-off layout.
• Injector Plug: the plug on your injectors. Bosch EV14 covers most Injector Dynamics injectors; Nippon Denso covers the ID2000.
• ECU, Alternator & MAP: your Haltech Nexus S2, S3 or R3 computer, the alternator plug (OBD1 for 1992-1995 parts, OBD2 for 1996-2000 parts) and the MAP sensor style (OEM or AEM).
• Built with Rywire's defaults for the remaining sensors: OEM-style intake air temperature plug, K24 crank sensor plug and Bosch knock sensor plug. A rear speed sub-harness for a Hall or magnetic sensor is available in Recommended Add-Ons.
• Building a K20? See the K20 version, which uses the K20 crank sensor plug. Running a Haltech Elite? See the Elite version.

Recommended Add-Ons

• Rywire Bosch Knock Sensor Kit with M12 to M8 Stud Adapter.
• Rywire Rear Speed Sensor Sub-Harness - Hall or Magnetic, Haltech B/K Harness.

Add any of these from the Recommended Add-Ons list above. Each one is its own listing.

What's Included

• Rywire K-Series standalone engine harness for the Haltech Elite, 4 injector
• Interior side as selected under Chassis Adapter

Frequently Asked Questions

Which Haltech computers does this harness work with?

Rywire lists the plug for the Haltech Elite 1000 and up; the configuration choices are the Elite 2500, 1500 and 750 and the Nexus S2, S3 and R3. Choose the exact computer under ECU so the correct plug is fitted.

Can I run a secondary injector bank with this harness?

No, this build has four injector outputs. For a secondary bank, Rywire offers the eight-injector version, the K-Series Haltech (8 Injector) Engine Harness.

Will it work with a K24?

Yes. This is the K24 version, built with the K24 crank sensor plug. Both versions use Rywire's default Bosch two-wire knock sensor plug, which matches the Rywire Bosch Knock Sensor Kit.

Which injector plug should I choose?

Bosch EV14 is the default and suits most Injector Dynamics injectors. Email service@tunedbyshawn.com with your engine, chassis and ECU before ordering if you are unsure which configuration you need. Tuned By Shawn can tune your swap on Haltech.

Should I buy the Rywire K24 Haltech harness or terminate a Haltech flying-lead harness myself?

A flying-lead harness suits a one-off layout if you have the crimp tools and time to terminate every connector. The Rywire K2-Haltech-NA harness arrives pre-terminated for the K24 engine and the Haltech Nexus S2, S3 or R3, with the chassis adapter, injector plug and alternator plug picked at checkout.

For off-road and competition use only. Not legal for use on pollution-controlled motor vehicles.