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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.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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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.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 5
Cute!
Color: Gold
Cute and simple. Good quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
Sleek and modern
Color: Black, Color: Black
Why did you pick this product vs others?:
This holder goes perfect with my decor. It’s very sturdy and makes it easy to tear off one sheet at a time. I’m so glad this is available as an alternative to those old style under the counter top holders. Rey modern looking.
Weight:
Perfect weight to handle a large roll
Build quality:
Good quality and sturdy
Paper towel holder:
Perfect for all size rolls
Size:
Hold large rolls
Ease of removal:
Very easy to tear off sheets of paper towels and to replace the roll
Functionality:
Easy to use
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 2, 2025
★★★★★ 5
Good purchase
Color: Gold, Color: Gold
It matches my decor and it was easy to assemble. I have been using it for the past month and so far it has done what’s it’s supposed to do, look pretty and hold the tissue roll in place. I am sure it will last years.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 27, 2026
★★★★★ 4
Good enough
Color: Black
It works but I find it gets pretty dirty on the bottom of it. I’m not sure how but I have to clean it every so often
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 2, 2025
★★★★★ 5
Works fine
Color: Black, Color: Black
I got this for the paper towel in the bathroom. It was easy to put together and it works fine
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
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