Protection Module - Transbrake Input

The Holley Protection Module - Transbrake Input (model 554-128) is a dedicated electronic control module designed specifically for transbrake systems in EFI-equipped vehicles. This compact unit is essential for managing the transbrake input signal pathway, providing a reliable interface between launch control logic and transbrake solenoid activation. It is particularly suited for drag racing and high-performance competition environments.

This module conditions and protects the transbrake command signal from the main EFI controller, ensuring clean engagement and disengagement during staged launches. Its compact dimensions (4.3 × 2.3 × 4.75 inches) allow for flexible underhood mounting in tight engine bays, while its lightweight design (0.25 lbs) adds negligible weight to the vehicle. The protection circuit effectively filters electrical noise and transient spikes that can occur during high-current solenoid switching, safeguarding sensitive EFI processor pins.

Holley's proven architecture ensures signal fidelity across a full range of engine RPM and load conditions, making it an invaluable component for bracket racers, Pro Stock teams, and dedicated drag racing programs utilizing Holley EFI systems. This module is crucial for achieving reliable transbrake operation on the launch line, whether competing in NHRA events or local bracket races.