Boost Controllers, Holley EFI, Solenoid Valve, 3 Port, 1/8 in. NPT, 2-pin ECU Pigtail, 3/16 in. Barb Fittings, 1/8 in. NPT Plug, Spare ECU Pin, Each
Brand:
Holley
Manufacturer's Part Number:
557-200
Part Type:
Boost Controllers
Product Line:
Holley Boost Control Solenoids
Summit Racing Part Number:
HLY-557-200
UPC:
090127683446
Boost Controller Type:
Electronic
Boost Controller Style:
Single solenoid
Adjustable:
No
Wastegate Type:
Electrical
Quantity:
Sold individually.
Holley Boost Control Solenoids
Holley boost control solenoids are designed for optimal performance when using the boost control function of Holley EFI. Some setups require two solenoids and some require one. They're driven by a Pulse Width Modulated (PWM) output of the ECU. It is advised NOT to use the PWM+ outputs on a Holley HP ECU, but rather use the PWM- outputs. If you have a Holley Dominator ECU, use either the PWM- outputs or a PWM+ output on the J2B connector.