Rywire RY-B1-BASE-EF-DX-EARLY OBD1 Budget Tucked Engine Harness for 88-89 Civic

Vehicle Fitment

• 1988-1989 Honda Civic DX/STD (EF chassis)
• 1988-1989 Honda CRX DX/STD (EF chassis)

Fitment Notes

• For B-Series and D-Series engine swaps into 1988-1989 EF DX/STD chassis only
• Uses OBD1 (1992-1995) ECU connectors -- does not support USDM OBD2 computers
• Aftermarket ECUs using OBD2 plugs and non-US OBD2 computers are compatible (except H22 and GSR stock units)
• OBD2 computer plug adapter available separately if needed
• Optional injector adapters available: OBD1-to-RDX, OBD1-to-ID, OBD1-to-OBD2
• Optional OBD1-to-OBD2 alternator adapter available separately

Features

• Complete tucked wire-tuck engine harness for a clean engine bay
• Cross-compatible with both Honda B-Series and D-Series engines
• Mil-Spec Teflon coated wire rated to 200°C maximum heat
• Single black wire color with expandable loom for a clean appearance
• All new connectors pneumatically crimped for OEM-quality connections
• White identification labels on each connector for easy installation
• Heavy interference circuits shielded and grounded
• 100% pin-to-pin quality tested and resistance checked
• Modular design -- chassis adapter separates from main harness for easy chassis swaps
• Plug-and-play compatible with Rywire Race Fuse/Relay Box V3 and Switch Panel

Specifications

• Part Number: RY-B1-BASE-EF-DX-EARLY
• Brand: Rywire Motorsport Electronics
• Product Line: Budget Tucked Engine Harness
• Engine Compatibility: Honda B-Series / D-Series
• ECU Connector Type: OBD1 (1992-1995) A, B, D Plugs
• Wire Type: Mil-Spec Teflon Coated
• Max Heat Rating: 200°C
• Loom Type: Expandable Black
• Chassis Adapter: RY-B-SUB-EF-DX-EARLY (included)
• Made in the USA
• Warranty: Rywire Limited (guaranteed to work; non-refundable if installed)

Included Components

• (1) B-Series / D-Series OBD1 tucked engine harness
• (1) RY-B-SUB-EF-DX-EARLY 1988-1989 Civic/CRX DX/STD chassis adapter
• Installation instructions

Product Description

The Rywire RY-B1-BASE-EF-DX-EARLY is a complete budget tucked engine harness designed for Honda B-Series and D-Series engine swaps into the 1988-1989 Civic and CRX DX/STD (EF chassis). Built with Mil-Spec Teflon coated wire rated to 200°C and protected with expandable black loom, this harness delivers clean wire-tuck aesthetics and reliable performance at a fraction of the cost of a full Mil-Spec build.

Every connector is pneumatically crimped with new materials and individually labeled for straightforward installation. The modular two-piece design separates the engine harness from the chassis-specific adapter, so if the engine moves to a different chassis down the road, only a new sub-harness is needed -- not an entirely new loom. The harness is plug-and-play compatible with the Rywire Race Fuse/Relay Box V3 and Switch Panel for gutted, race, or custom builds, and supports optional injector and alternator adapters for maximum flexibility across OBD configurations.