Feature: 1. Function: This harness connects your K Series engine harness to the internal chassis harness while adding the E plug and all its features. This harness is primarily used for K‑Pro or reflash ECU's. 2. Application: The harness can be used for custom open wheel vehicles such as the for Ariel Atom, for RCR Superlite Roadster, for Sandrails, and 3 wheel trikes. It is also used for MR‑2, for Lotus Elises, and full blown tubed frame race cars. 3. Characteristic: The race harness includes a fuel pump relay, a main relay, and a main oxygen sensor relay. The harness comes with provisions for OEM K Series 02‑04 wideband o2 sensors and for an OBD2 port. 4. Multifunction: The harness has outputs that include a tachometer, speedometer, low oil pressure warning, fault indicator, fan control, fuel pump control, and starter relay. You will need to provide constant 12V to the harness. 5. Plug and Play Installation: The K swap conversion harness interfaces with your factory dash harness, OEM K Series engine harness and K Series ECU for a simple plug and play K Swap. 6. Description: This harness works with all USDM JDM 02‑04 harnesses including K20A, K20A2, K20A3. The harness is wired to use the factory wideband O2 sensors, so European customers using the UKDM K20A K20A2 harnesses will need to convert the harness to use narrowband type sensors. Specification: Item Type: Swap Conversion Harness Material: ABS + Metal + Rubber Description: Universal K Series swap conversion harness designed for those who decide to install a K Series engine into a non for Acura chassis or a chassis without a standard plug and play conversion harness Fitment: Fit for Acura 2002-2004 K Series. Package List: 1 x Harness Note: This harness will not fit any 2005‑2006 or K24 engine harnesses and ECUs.