Holley Boost Control Solenoids 557-201 Controllers, EFI, Dual Solenoid Valve, Billet Aluminum, 3 Port Manifold, 1/4 in. NPT, Push-lock Fittings, Two Trminated Connectors, Each
Holley Boost Control Solenoids 557-201 Controllers, EFI, Dual Solenoid Valve, Billet Aluminum, 3 Port Manifold, 1/4 in. NPT, Push-lock Fittings, Two Trminated Connectors, Each
Description
Boost Control Solenoid - Dual Port - Fittings Included - Holley EFI - Kit
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:15:14
Features
Note for Australian and European Markets
Unless otherwise stated, this product may be engineered for use in Left-Hand Drive vehicles. Steering components, pedals, shifters, linkages, wing mirrors, instrument clusters, panhard rods/traction bars, drag links, brake boosters, brake or clutch lines, accelerator cables, heater cores, some master cylinders and adjacent parts can vary between LHD and RHD configurations. In some models compenents such as windscreen wiper arms, motors and linkages could differ in their size and orientation. Items such as floor mats & dash mats may have differences in their structure around the front row (or padding in different locations). In many cases items are identical depending on the design of the vehicle and part, but may have differing mounts, lengths or bolt patterns. Carefully review the product images and details to ensure suitability for your vehicle, or contact StreetFX support if you are unsure. Returns are not accepted for special order products.
(keyword: manifold)Vehicle Compatibility and Return Conditions.
This item was designed and engineered in the USA for US domestic vehicles. OBD tools, ECUs, dongles, programmers, and tuners may have limited compatibility with vehicles outside the USA due to regional differences in emission standards and system configurations. Some features and functionality may vary depending on the vehicle and location.
Some electronic tuning devices and programmers require activation, registration, or pairing with a specific vehicle’s VIN (Vehicle Identification Number). Once activated or paired, these devices may become permanently associated with that vehicle, restricting or preventing their use on another vehicle, resticting our ability to offer returns or exchanges.
Please review the product details and images to ensure it meets your needs. For clarification or assistance, feel free to contact a StreetFX agent. Note: Returns are not accepted for special order or tuning products unless the unit is deemed faulty.
Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Holley, Hilborn, Holley Efi, Retrobright, Terminator X |
| StreetFX SKU | hly557-201 |
| SFX Item ID | 4782462 |
| Accounting SKU | hly-557-201 |
| Manufacturer SKU | 557-201 |
| Manufacturer UPC | 090127047088 |
| Alternative References | 557-201, HLY-557-201, HOL557-201 |
Boost Controllers, Holley EFI, Dual Solenoid Valve, Billet Aluminum, 3 Port Manifold, 1/4 in. NPT, Push-lock Fittings, Two Trminated Connectors, Each
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.
| Product Attributes | |
|---|---|
| Brand | Holley |
| Manufacturer's Part Number | 557-201 |
| Part Type | Boost Controllers |
| Product Line | Holley Boost Control Solenoids |
| UPC | 090127047088 |
| Boost Controller Type | Electronic |
| Boost Controller Style | Dual solenoid |
| Adjustable | No |
| Wastegate Type | Electrical |
| Quantity | Sold as a kit. |
Compatibility
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