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AF2851-3040
In the world of racing and performance
Old Tyme 3-3/8" Black 120mph Electronic Speedo
Mechanical
Universal 1000 cfm 4BBL Throttle Body4150 Flange
Boost Controll Solenoid Valve HO557-200 Pump Hangers AF2851-3040Boost Controll Solenoid Valve3 Port Valve HO557 200 557 200 Holleys 3 port boost control solenoid is designed for optimal performance when using the boost control function of Holley EFI. Some setups require two solenoids and some require one. The solenoid is driven by a Pulse Width Modulated (PWM) output of the ECU. It is advised NOT to use the PWM+ outputs on an HP ECU, but rather use the PWM Outputs. If you have a Dominator ECU, either use the PWM
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