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Description
Holley 557-200 3 Port Boost Control SolenoidFor Boost Control Part Number: 557 200 Our 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 outputs, or use a PWM+
For Boost ControlPart Number: 557-200
Our 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- outputs, or use a PWM+ output on the J2B connector.
Features and Benefits
• 3 port
• For boost control
• Used with Dominator and HP
• Includes (1) solenoid, (1) ECU pigtail harness with factory crimped ECU pin, (3) 3/16" barb fittings, (1) 1/8" NPT plug, (1) sintered brass muffler. and (1) spare ECU pin for modified harness lengths
Solenoid is driven directly from a Pulse Width Modulated (PWM) ECU output.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.4 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Happy with my purchase
Size: 3X-Large, Color: Lake Blue, Size: 3X-Large, Color: Lake Blue
I was pleased with my purchase good quality great price will be ordering another color soon
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Reviewed in the United States on May 20, 2025
★★★★★ 4
Great color and style.
Size: XX-Large, Color: Purple
After having the suit tailored, it looked and felt expensive.
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Reviewed in the United States on May 13, 2025
★★★★★ 5
Quality and cost.
Size: XX-Large, Color: Lake Blue
Perfect transaction.
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Reviewed in the United States on April 16, 2025
★★★★★ 5
I absolutely loved how this suit fit my husband. We ordered another white one, he’s wearing an XL
Color: Dusty Sage, Size: X-Large, Color: Dusty Sage, Size: X-Large
Great fit quality material
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Reviewed in the United States on May 5, 2026
★★★★★ 5
I absolutely loved how this suit fit my husband. We ordered another white one, he’s wearing an XL
Color: Dusty Sage, Size: X-Large, Color: Dusty Sage, Size: X-Large
Great fit quality material
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026