Rywire RY-INJ-ADAPTER-2-RDX OBD2 Harness to RDX Injector Adapters Set of 4

Vehicle Fitment

Universal fit - not vehicle-specific. Compatible with any Honda or Acura vehicle or engine swap application where the harness uses OBD2-style fuel injector connectors and the build requires Acura RDX 410cc injectors. Commonly used in K-Series engine builds (K20A, K20A2, K20Z, K24A, K24Z) and B/D/H-Series swap builds running OBD2 engine harnesses where RDX injectors are installed.

Fitment Notes

• Harness side: OBD2 injector connector - this adapter mates to OBD2-style Honda injector plugs; if your harness uses OBD1 injector connectors (common on 92-95 Honda/Acura and OBD1 conversion harnesses), you need the OBD1-to-RDX version instead: RY-INJ-ADAPTER-1-RDX
• Injector side: Acura RDX 410cc injector connector - fits the 2007-2012 Acura RDX OEM fuel injectors and any injector using the same RDX-style connector body
• Set of 4 - one adapter per cylinder; a complete 4-cylinder installation requires exactly one set of 4
• No vehicle-specific fitment - these adapters work with any Honda/Acura engine or swap harness that has OBD2 injector clips, regardless of chassis

Features

• Plug-and-play RDX injector installation with OBD2 harnesses - the 2007-2012 Acura RDX uses 410cc high-impedance (saturated) fuel injectors with a connector body that does not directly mate to standard Honda OBD2 injector harness clips; without adapters, using RDX injectors on a standard OBD2 harness requires splicing or replacing connector bodies; the RY-INJ-ADAPTER-2-RDX provides a clean, no-solder, no-splice solution by bridging the OBD2 harness clip to the RDX injector connector in a plug-in pigtail form
• Why RDX injectors - the Acura RDX 410cc injectors are among the most widely adopted OEM fuel injector upgrades in the Honda K-Series tuning community; they provide approximately 410cc of fuel flow (compared to approximately 240-280cc in stock K20/K24 injectors), are high-impedance (saturated type, no resistor box required), and use the same fuel rail O-ring sizing and insertion depth as factory K-Series injectors - making them a direct drop-in fuel injector upgrade for naturally aspirated and mildly forced-induction builds that outgrow factory injector capacity without requiring a custom fuel rail or injector hat
• Rywire quality construction - Rywire injector adapters use new connector bodies and are crimped with the same pneumatic tooling used in their engine harness production; the connections are secure and vibration-resistant for sustained use in high-heat engine bay environments
• Retains stock harness integrity - by using plug-in adapters rather than cutting or splicing the injector harness, the original harness connectors are preserved; if the build later requires returning to stock injectors or changing injector type, the adapters can be removed and the original connectors reinstated without harness modification

Specifications

• Part Number: RY-INJ-ADAPTER-2-RDX
• Brand: Rywire (Rywire Motorsport Electronics, Garden Grove, CA)
• Function: OBD2 injector harness connector to Acura RDX injector connector
• Harness Side Connector: OBD2 Honda/Acura injector clip
• Injector Side Connector: Acura RDX 410cc injector body connector
• Quantity: 4 adapters per set
• Fitment: Universal (no vehicle-specific application)

Included Components

• 4x OBD2-to-RDX injector adapter pigtails

Product Description

The Rywire RY-INJ-ADAPTER-2-RDX is a set of four plug-in injector adapter pigtails that allow Acura RDX 410cc fuel injectors to mate directly with Honda OBD2-style injector harness connectors - no splicing, no soldering, no permanent harness modification. The adapters bridge the gap between the OBD2 Honda injector clip on the harness side and the unique RDX injector connector on the injector body, providing a clean and reversible installation.

The Acura RDX 410cc injector has become the go-to OEM fuel injector upgrade across the Honda K-Series platform and many B/D/H-Series swap builds because it delivers approximately 410cc of flow in a high-impedance (saturated) design that drops into factory K-Series fuel rails without requiring custom rails, injector hats, or resistor boxes. The factory K20 and K24 injectors at 240-280cc are the limiting factor for builds that push into the 300+ whp range on forced induction, and the RDX injector provides a meaningful flow increase at a price point that standard aftermarket injectors at the same flow rate cannot match.

The RY-INJ-ADAPTER-2-RDX is for OBD2 harnesses specifically. For OBD1 harnesses (92-95 Honda/Acura or OBD1 conversion harnesses), the correct adapter is the RY-INJ-ADAPTER-1-RDX. Sold as a set of 4 - one adapter per cylinder for a complete 4-cylinder installation.