Holley EFI- 554-128 Transbrake Input Protection Module

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554-128 is a device that allows for an ECU input to be safely connected directly to the +12V side of the transbrake solenoid. This device protects the ECU input from damaging flyba ck voltage which occurs when the transbrake is released. Not using this device will cause damage to the ECU over time. Features: 554-128 is a device that allows for an ECU input to be safely connected directly to the +12V side of the transbrake solenoid. This device protects the ECU input from damaging flyback voltage which occurs when the transbrake is released Show more