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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
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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
4.9 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
Cute, big enough and top notch quality
These are SO CUTE! The look exactly like the pictures so I am really glad about that.
They are quite substantial in size, big enough. See pics :). I gift one of three to my friend's dog.
The texture is soft and boucle like and soothing for me and the doggos! The squeakiness is very prominent but not present in all parts of the toy - so its annoying. I am also glad these have no stuffing because they look great as is and lack of the stuff make them easy to chew on.
The cuteness got me on this one and I may repurchase again, if need be.
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Reviewed in the United States on October 2, 2025
★★★★★ 4
No mess toys
My chiweenie ripped out the squeaker in 5 minutes. Other than that they are good toys. No mess.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Very nice
Super cute, my pups love them.
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Reviewed in the United States on May 24, 2026
★★★★★ 3
not very long lasting
I like the fact that they have no stuffing. My 20-pound dog chewed through these in no time and got the squeaker out and tried to eat it. My dog enjoyed tearing it apart. I had to chase him around to get the squeaker out of his mouth. The size is great for a medium sized dog. However, it lasted only minutes before it was ruined.
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Reviewed in the United States on June 4, 2026
★★★★★ 5
Great dog toys!
Great dog toys! My dogs love the crunchy sound and it keeps them busy!
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Reviewed in the United States on June 1, 2026