Rywire RY-B1-MILSPEC-EF-DX-LATE Mil-Spec Harness 90-91 Civic/CRX

Vehicle Fitment

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

Features

• Rywire Mil-Spec B/D-Series engine wiring harness with chassis adapter
• Designed for 1990-1991 Honda Civic & CRX (EF DX/STD)
• High-quality Mil-Spec Teflon-coated wiring for heat & chemical resistance
• Raychem DR-25 heat shrink for moisture protection
• Automotive-grade molded connectors with pneumatic crimps
• Color-coded identification tags for easier installation
• Compatible with aftermarket ECUs, engine harnesses, and performance builds
• Ideal for custom swaps, performance harness upgrades, and wire-tuck builds

Specifications

• Brand: Rywire
• Part Number: RY-B1-MILSPEC-EF-DX-LATE
• Application: Mil-Spec B/D-Series OBD1 engine harness w/ chassis sub harness
• Fitment Years: 1990, 1991
• Chassis: Honda Civic & Honda CRX EF (DX/STD)
• Wire Insulation: Mil-Spec Teflon (ETFE)
• Heat Rating: Up to 200 °C
• Connectors: OEM-style pneumatic-crimped terminals

Included Components

• 1x Rywire Mil-Spec B/D-Series engine harness
• 1x Chassis specific adapter harness for EF DX/STD 90-91

Product Description

The Rywire RY-B1-MILSPEC-EF-DX-LATE Mil-Spec Engine Harness with chassis specific adapter is engineered for performance and reliability on 1990-1991 Honda Civic and Honda CRX EF DX/STD models. Built with Mil-Spec Teflon-coated wiring and quality Raychem DR-25 heat shrink coverage, this harness resists high heat and moisture while offering improved durability over stock wiring. Pneumatically crimped OEM-style connectors and labeled terminals help simplify installation and improve connection integrity.

This harness is designed for use in custom engine swap projects, wire tuck builds, or when retrofitting aftermarket ECUs or performance engine harnesses. It includes the correct chassis adapter for the 1990-1991 EF DX/STD platform, providing a plug-and-play-ready solution that reduces installation time and helps maintain clean engine bay routing. Performance enthusiasts and professional installers appreciate the build quality and long-term reliability that this Mil-Spec harness delivers in demanding automotive environments.