Rywire RY-B1-BASE-EF-DX-LATE Budget Engine Harness for 1990-1991 Honda Civic/CRX

Vehicle Fitment

• 1990-1991 Honda Civic (all trims) - EF chassis
• 1990-1991 Honda CRX (DX/STD) - EF chassis

Features

• Rywire budget B/D-Series OBD1 engine harness with chassis adapter
• Designed for Honda B-Series and D-Series engine swaps with OBD1 ECU
• Chassis-specific adapter for EF-DX-Late interior harness connections
• Wire-tuck layout for cleaner engine bay routing
• Single-color expandable loom for simplified installation
• OEM-style connectors crimped with pneumatic heads for secure fit
• Tagged wires for easier identification during installation
• Made in USA motorsport-grade wiring harness solution

Specifications

• Part Number: RY-B1-BASE-EF-DX-LATE
• Application: Budget engine harness with chassis adapter
• Compatible Engines: Honda B-Series & D-Series OBD1 engines
• Connector Type: OBD1 92-95 ECU connectors (adapter required for some computers)
• Chassis Adapter: Included for 1990-1991 Civic/CRX DX/STD
• Wiring Style: Wire-tucked with expandable loom
• Made in: USA
• Harness Role: Engine-to-chassis wiring integration

Included Components

• 1x Rywire budget B/D-Series engine harness
• 1x Chassis-specific adapter for EF Civic/CRX (1990-1991)
• Connectorized plugs and labeled wiring for ease of installation

Product Description

The **Rywire RY-B1-BASE-EF-DX-LATE** is a complete **budget-level engine harness** engineered for **Honda B-Series and D-Series OBD1 engine swaps** into **1990-1991 Honda Civic and CRX (DX/STD)** chassis. This harness combines a wire-tucked main harness with a **chassis-specific adapter** that mates to the EF-DX-Late interior wiring without cutting stock harnesses, preserving factory wiring integrity.

Built in the **USA** with quality connectors and durable expandable loom, the harness simplifies wiring for performance engine conversions, making it easier to connect sensors, OBD1 ECU plugs, and engine circuits while maintaining a clean engine bay. Clear labeling and OEM-style crimped connections provide a more professional and reliable electrical interface than stock or modified factory harnesses, ideal for street or track builds.