{"product_id":"hybrid-racing-conversion-harness-for-honda-crx-k-swap-1988-1991-plug-and-play-hyb-cwh-01-07","title":"Hybrid Racing Conversion Harness for Honda CRX K Swap (1988-1991) Plug and Play HYB-CWH-01-07","description":"\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cb\u003eFitment Information\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHonda CRX K Swap (1988, 1989, 1990, 1991)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cb\u003eFitment note\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with 02-04 USDM and JDM K20A, K20A2, and K20A3 engine harnesses and their corresponding ECUs.\u003c\/li\u003e\n\u003cli\u003eNot compatible with 05-06 K-Series engine harnesses, K24 engine harnesses, or any K24 ECU. UKDM customers will need to adapt the wideband O2 sensor connection to narrowband.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNo core harness is required. Your factory dash harness is not modified and does not need to be sent in.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eSpecs \u0026amp; Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlug and play K-Swap conversion harness!\u003c\/li\u003e\n\u003cli\u003eBrand new OEM connectors and pins \u003c\/li\u003e\n\u003cli\u003eFree phone and email tech support.\u003c\/li\u003e\n\u003cli\u003ePowering 1000's of K-Swaps world wide!\u003c\/li\u003e\n\u003cli\u003e1x fully assembled and tested K Swap Conversion Harness (HYB-CWH-01-07)\u003c\/li\u003e\n\u003cli\u003eAll connectors pre-installed — no splicing or soldering needed\u003c\/li\u003e\n\u003cli\u003eClearly labeled wires throughout for straightforward routing\u003c\/li\u003e\n\u003cli\u003eAccess to Hybrid Racing tech support for installation questions\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cb\u003e\u003c\/b\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIf you're dropping a K-Series engine into your Honda CRX, the wiring is the part that trips most builders up. This harness is built specifically for that job. The Hybrid Racing K Swap Conversion Harness connects your factory EF dash harness to an 02-04 K-Series engine harness and K-Series ECU, giving you a complete, plug-and-play wiring solution without cutting into your stock harness or sending in a core.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Hybrid Racing Builds It This Way\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHybrid Racing sources their connectors, terminals, and wire from the same Japanese manufacturer Honda uses for OEM production. That's not marketing language — it means the connector housings, terminal pins, and wire gauge specs are identical to what came on your K-Series engine from the factory. Every harness is machine-assembled and then hand-inspected before it ships. There are no soldered joints anywhere in the harness. Solder joints crack under heat cycling and vibration; this harness uses crimped, sealed terminals throughout, which is the correct method for an automotive environment.\u003c\/p\u003e\n\u003cp\u003eHybrid Racing has been making this harness for over ten years, and it's been used in thousands of K-swaps worldwide. If you run into an issue during your install, their tech support team covers swap-related wiring questions — not just \"did you plug it in right\" support, but actual K-swap knowledge.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible ECUs and Engine Variants\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis harness is designed around the 02-04 USDM and JDM K-Series engine harness. Compatible engine and ECU combinations include:\u003c\/p\u003e\n\u003cp\u003eK20A (JDM) with matching 02-04 JDM ECU\u003cbr\u003eK20A2 (USDM RSX Type-S) with PRB ECU\u003cbr\u003eK20A3 (USDM RSX base \/ EP3 Civic Si) with PND or similar ECU\u003cbr\u003eThis harness is not compatible with 05-06 K-Series engine harnesses, K24 engine harnesses, or their corresponding ECUs. If you're running a K24A2 or K24Z engine, this is not the right harness for your build. UKDM (European) customers using a UKDM engine harness will need to adapt the wideband O2 sensor connection to narrowband.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat It Connects\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe conversion harness acts as the bridge between three separate wiring systems that don't natively talk to each other in an EF chassis swap:\u003c\/p\u003e\n\u003cp\u003eYour EF factory dash harness — preserves your factory gauge cluster, including tach, temp, and fuel gauge signals\u003cbr\u003eYour 02-04 K-Series engine harness — all engine management signals pass through correctly\u003cbr\u003eYour K-Series ECU — the ECU sees a clean, correct signal environment\u003cbr\u003eYou do not need to modify or send in your stock EF harness. Everything plugs in on both ends.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation Overview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis harness is designed for builders who are doing the swap themselves. You'll need your K-Series engine harness already attached to the engine, your EF dash harness in good condition, and a compatible K-Series ECU relocated to your EF's ECU mounting location. The conversion harness routes between the firewall and ECU area, connecting the EF dash harness plugs on one end and the K-Series engine harness and ECU plugs on the other. All wires are labeled, so you're not guessing which connector goes where. A full installation guide is not included in the box, but Hybrid Racing's tech support can walk you through any step of the process.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDoes this harness work with a K24 swap in an EF chassis?\u003cbr\u003eNo. This harness is built for 02-04 K20A, K20A2, and K20A3 engine harnesses only. K24 harnesses and ECUs have different pinouts and are not compatible with this conversion harness.\u003c\/p\u003e\n\u003cp\u003eDo I need to send in my factory EF harness?\u003cbr\u003eNo. Unlike some competitors who require you to ship in your OEM harness for modification, this harness arrives fully assembled and ready to install. Your factory EF harness stays in the car untouched.\u003c\/p\u003e\n\u003cp\u003eWill my factory gauge cluster still work after the swap?\u003cbr\u003eYes. The conversion harness is specifically designed to pass the correct signals to your EF gauge cluster, including the tachometer, coolant temp, and fuel level. You won't lose factory gauge functionality.\u003c\/p\u003e\n\u003cp\u003eCan I use this with a standalone ECU or piggyback tune?\u003cbr\u003eThis harness is designed around OEM K-Series ECU pinouts. If you're running a standalone ECU like Hondata KPro (which re-uses the OEM ECU shell and pinout), it will work. If you're using a fully standalone ECU with a different plug configuration, contact Hybrid Racing before purchasing.\u003c\/p\u003e\n\u003cp\u003eIs this harness emissions-legal or smog-compliant?\u003cbr\u003eHybrid Racing does not make emissions compliance claims for this harness. K-swap legality varies by state and local regulations. Check your local smog laws before proceeding with any engine swap.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIn the Box\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1x Hybrid Racing K Swap Conversion Harness (HYB-CWH-01-07), fully assembled and tested\u003c\/li\u003e\n\u003cli\u003eAll connectors pre-installed on both the EF dash harness side and the K-Series engine harness side\u003c\/li\u003e\n\u003cli\u003eAll wires labeled for identification during installation\u003c\/li\u003e\n\u003cli\u003eAccess to Hybrid Racing tech support for K-swap wiring questions\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":43043469754448,"sku":"HYB-CWH-01-07","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0058\/0252\/4785\/files\/HYB-CWH-01-07_1.jpg?v=1792510447","url":"https:\/\/shop.redline360.com\/products\/hybrid-racing-conversion-harness-for-honda-crx-k-swap-1988-1991-plug-and-play-hyb-cwh-01-07","provider":"Redline360","version":"1.0","type":"link"}