Power Grid Power Module 4-Stage Relay

The MSD Power Grid Power Module 4-Stage Relay (SKU MSD7764) is a high-capacity electrical distribution and switching system designed for custom automotive ignition and data acquisition applications. This universal module serves enthusiasts building performance engine management systems, race cars, and advanced diagnostic setups where reliable multi-channel power distribution is critical. The four independent 20-amp relay channels provide clean, regulated power switching for fuel pumps, ignition systems, fans, and auxiliary components.

Built with MSD Ignition's proven engineering, the Power Grid module features four isolated 20-amp channels that eliminate voltage drop and ground loop issues common in high-demand electrical circuits. The plastic enclosure in distinctive red housing protects internal relay logic while keeping the overall footprint compact at 8.6 x 4.6 x 12 inches—ideal for engine bay or interior installation. Complete wiring harness included streamlines installation, and the module's architecture supports data acquisition integration, allowing real-time monitoring of electrical loads and system diagnostics for serious tuning applications.

This relay module is essential for drag racing, street performance, and custom automotive builds where stock electrical systems cannot handle upgraded fuel injectors, high-output fuel pumps, or ancillary equipment. The modular design works across virtually any make and model—from carbureted restorations to modern EFI swaps—making it a versatile solution for engine builders, tuners, and restoration shops. At 3.31 lbs, installation requires minimal vehicle modification, and the included wiring harness accommodates both OEM integration and custom fabrication scenarios.