This modkit provides all the components needed to build a relay control circuit for your MegaSquirt ECU. It's designed to enable on/off switching of external devices via relay control—perfect for controlling electric fans, variable valve timing (VVT), VTEC, TVIS, or any other relay-driven accessory.

Features:

• Compatible with PCB v3.0, v3.57, and v2.2 MegaSquirt ECUs

• Supports a wide range of relay-driven outputs

• Includes all required components for a complete relay control circuit build

• Ideal for engine swaps and custom EFI setups needing programmable relay control