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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
Holley Boost Control Solenoids 557-201SOLENOID, BOOST CONTROL Introducing the newest development from the Holley EFI engineering team. The Holley EFI High Flow Dual Port Boost Control Kit. This kit contains a set of pre installed high flow solenoids, which feature a dual O ring sealing design, preventing any boost leaks out of the manifold. A black anodized billet aluminum manifold, with built in mounting provisions. Two pre terminated connectors for a quick installation, and extra pins
SOLENOID, BOOST CONTROL
Introducing the newest development from the Holley EFI engineering team. The Holley EFI High Flow Dual Port Boost Control Kit. This kit contains a set of pre-installed high flow solenoids, which feature a dual O-ring sealing design, preventing any boost leaks out of the manifold. A black anodized billet aluminum manifold, with built in mounting provisions. Two pre-terminated connectors for a quick installation, and extra pins for those of you wanting to cut the harnesses to custom lengths. Finally two 1/4" push-lock fittings to simplifying the installation process. The Holley EFI boost control proprietary solenoid design flows nearly 40% more than comparable designs and up to 90% more than conventional 3-port boost control solenoids.
Features:
- Black Anodized Billet Dual Port Manifold
- Two 1/4” NPT Push-Lock Fittings for easy plumbing and installation
- Two Pre-Terminated connectors simply plug into the solenoids and pin into Holley EFI ECU connectors
- The billet manifold contains built in mounting provisions, setup for ¼ hardware
- Proprietary design to flows nearly 40% more than comparable designs and up to 90% more than conventional 3-port boost control solenoids
Specs
| Brand | Holley EFI |
|---|---|
| Color | Black |
| Emission Code | 5 |
| Inlet / Outlet Size | 1/4" NPT |
| Material | Billet |
| Product Type | Boost Control Part |
| Part Number | 557-201 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.5 ★★★★★
Based on 1933 reviews
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Product Reviews
★★★★★ 5
Excellent wire!
Size: 2 Colors each 10FT, Style: 10AWG
This wire is very soft and flexible. Many strands and tinned nicely. A perfect upgrade for my power wheel wires that keep melting. These have been running for months in exterior environment without any issues.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 31, 2025
★★★★★ 5
Perfect for what I needed.
Size: 2 Colors each 10FT, Style: 10AWG
I used this wire for the umbilical cord from my truck to my slide in camper. The flexibility of this wire makes it much easier handle and route in between the cab and bed. I do have it enclosed in a flexible cover.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 2, 2019
★★★★★ 5
Just what I wanted
Size: 6 Colors each 5FT, Style: 10AWG
Liked the color coding of the silicon insulation and the flexibility
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 5, 2024
★★★★★ 4
Fit my needs
Size: 2 Colors each 10FT, Style: 10AWG
Just what I needed, worked well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 13, 2020
★★★★★ 5
Just a little color
Size: 6 Colors each 5FT, Style: 10AWG
Thank you for your product I'll be back thank you again nice very nice..
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 23, 2024
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