VTI

Honda Main Relay 40A 4-Pin Conversion Kit – Mil-Spec Sealed

$50.00 USD

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Honda Main Relay 40A 4-Pin Conversion Kit

This Honda main relay conversion kit replaces the factory multi-pin main relay with a properly gauged, sealed 40A 4-pin relay, providing improved reliability for modified, swapped, and performance-focused Honda builds.

Designed and built in-house by VTEC Innovations, this kit eliminates common main relay failure points while maintaining clean OEM-style mounting and serviceability.

Proper 40A Relay Conversion for Reliability

The factory Honda main relay is a known failure point, especially in aging chassis and modified vehicles. This conversion replaces the factory relay logic with a high-quality sealed 40A relay, offering increased current handling and improved long-term reliability.

This setup is ideal for vehicles running aftermarket ECUs, upgraded fuel systems, or simplified chassis wiring.

OEM Connector Options by Chassis

This main relay conversion kit is available with selectable OEM connector styles to match your chassis.

CRX / OBD0 applications use the white connector style commonly found in early chassis.

OBD1 and OBD2 Civic applications use the brown 7-pin connector style found in later Honda platforms.

Each option uses genuine OEM Honda connectors to ensure proper fitment and factory-style integration.

Mil-Spec Wiring & Sealed Components

All wiring is constructed using top-tier mil-spec M22759/32 (Tefzel) wire, selected for its heat resistance, durability, and long-term reliability. A sealed automotive-grade 40A relay is used to protect against moisture, vibration, and corrosion.

Harness length is approximately 8 inches from connector to relay, keeping the installation compact and clean inside the cabin.

Factory-Style Mounting Hardware Included

Each kit includes mounting hardware designed to allow the relay and connector to be mounted cleanly in the factory main relay location inside the cabin.

This ensures a secure installation while maintaining OEM-style service access and appearance.

Optional Main Kill Switch Integration

An optional main kill switch upgrade is available for customers who want added control or security.

This option includes:

Flush-mount kill switch
Approximately 3 feet of pre-terminated leads
Designed for clean integration into the main relay power circuit

This option is ideal for track cars, anti-theft setups, or builds requiring manual power control.

Compatibility

Designed for Honda chassis using factory main relay systems, including CRX, OBD0, OBD1, and OBD2 Civic platforms, depending on the selected connector option.

This conversion is compatible with stock and aftermarket ECU configurations when wired correctly.