Ignitions and Electrical Wiring Harnesses

Rywire

Rywire Honda B/D-Series Mil-Spec Engine Harness w/Chassis Specific Adapter

$899.00

SKU: R00L RY-B2-MILSPEC-EF-DX-LATE

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

High-quality Mil-Spec (Teflon-coated, 200°C rated) wiring harness for 1990-1991 Honda Civic/CRX (EF chassis) DX/STD models undergoing B-series or D-series engine swaps. Features Raychem DR-25 heat shrink, adhesive-lined wire junctions, and aerospace-grade ETFE (Tefzel) insulation for durability against heat, moisture, chemicals, and radiation. Connectors are pneumatically crimped and labeled. Protects heavy interference circuits. Uses OBD1 (92-95) Computer Connectors, but "OBD2" designation refers to Alternator, Distributor, and Injector connectors. Compatible with aftermarket ECUs using OBD2 plugs and non-US OBD2 computers; *not* compatible with USDM factory OBD2 ECUs (H22 and GSR stock computers also incompatible). Modular design allows engine harness separation from chassis-specific sub-harness. Optional add-ons (firewall connector, RACE fuse box, SWITCH PANEL) available separately. Injector, alternator, distributor, and charge harness adapters sold separately.

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Specifications

BrandRywire
Part NumberR00L RY-B2-MILSPEC-EF-DX-LATE

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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