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Description
Holley Boost Control Solenoid # HO557-201Holley Boost Control Solenoid # HO557 201 Boost Control Solenoids, Dual Solenoid Style, Electronic, Kit Boost Controller Type: Electronic Boost Controller Style: Dual solenoid Adjustable: No Wastegate Type: Electrical Quantity: Sold as a kit. 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.
Holley Boost Control Solenoid # HO557-201Boost Control Solenoids, Dual Solenoid Style, Electronic, Kit
Boost Controller Type:
Electronic
Boost Controller Style:
Dual solenoid
Adjustable:
No
Wastegate Type:
Electrical
Quantity:
Sold as a kit.
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.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.5 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 4
Nice Jewelry Box
Color: Jelly Pink, Material Type: Paper, PU, Color: Jelly Pink, Material Type: Paper, PU
Really nice jewelry box just smaller than expected. My fault for not checking the dimensions first. It’s a great value for the price.
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Reviewed in the United States on May 11, 2026
★★★★★ 5
Nice little jewelry box
Color: Cloud White, Material Type: Paper, PU
Just what I wanted in size and available compartments. The only thing I am hesitant about is the paper outside. Mine is white and may get dirty quickly.
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Reviewed in the United States on March 16, 2026
★★★★★ 5
A Lovely and Useful Gift
Color: Cloud White, Material Type: Paper, PU
I bought this SONGMICS jewelry organizer box as a gift and it was a great choice. The design is beautiful and it keeps jewelry well organized. It’s compact and perfect for travel or everyday use. The person I gave it to loved it and uses it all the time.
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Small and cute!
Color: Cloud White, Material Type: Paper, PU
Its perfect!
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Great jewelry box for travel
Color: Cloud White, Size: 8"W
Great jewelry box for travel. Especially if you like to take a lot of jewelry to use with your outfits. It's small enough to not take up a lot of room buttholes a good amount of jewelry.
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Reviewed in the United States on March 21, 2026