Solid State Relay Upgrade Kit

The Precision Raceworks Solid-State Relay Upgrade Kit provides everything needed to convert your fuel pump system to full PWM control, combining our Solid-State Relay Fuel Pump Interface Module with a high-quality solid-state relay for a complete plug-and-play solution. Designed specifically for use with our pump activation harnesses, this kit delivers smoother operation, improved reliability, and enhanced fuel system performance compared to traditional relay setups. One kit is required per pump being controlled.

By transitioning from simple on/off relay control to true PWM modulation, your fuel pump operates only as hard as the engine demands. This results in cooler fuel temperatures, reduced pump wear, and quieter operation—while maintaining consistent, reliable fuel delivery even under extreme conditions. When paired with a Motiv Re|Flex+, this kit performs best at 200 Hz for optimal control and stability.

Ideal for street, track, and high-performance builds, the Solid-State Relay Upgrade Kit ensures clean switching, proper inductive load handling, and rock-solid electrical behavior with none of the issues associated with mechanical relays.

Key Features:

• Complete upgrade kit: includes solid-state relay and interface module

• Fully plug-and-play with our pump activation harnesses

• One kit required per pump being controlled

• Enables precise PWM control of the fuel pump

• Recommended 200 Hz operation for Motiv Re|Flex+ users

• Reduces fuel temperature under part-load operation

• Allows progressive ramp-up of pump output based on engine demand

• Minimizes electrical noise and protects control electronics

• Provides smoother, quieter pump operation

• Automotive-grade components built for performance and durability

Benefits of PWM Fuel Pump Control:

• Cooler fuel due to reduced pump load at low duty cycles

• Improved drivability and tuning flexibility

• Reduced pump strain and extended pump life

• Ability to tailor pump output to boost, RPM, or load

• More stable system pressure under dynamic conditions

Whether upgrading an existing setup or building a fully modernized fuel system, the Solid-State Relay Upgrade Kit delivers reliable PWM-driven performance with the durability and ease of installation expected from our products.