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    Sale!

    Holley Sniper EFI Eliminates the need to rewire your existing Sniper EFI installation 558-489

    SKU: FRCQ_558-489
    Save $8.86
    Sale Price $56.09 Regular Price $64.95
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    Want to make the switch from the original Sniper EFI to Sniper 2 and don't want to rewire your system? This harness is designed to do exactly that! The Sniper adapter harness is a plug-and-play solution to connect your existing Sniper 1 wiring harness to a Sniper 2 throttle body. This can be used with any Sniper 2 system that is not equipped with a power distribution module (PDM). Remove your Sniper EFI throttle body from the intake manifold, unplug all of the connectors, and plug the Sniper EFI 2 adapter harness into your existing main harness. Cycle your ignition key, run a fresh wizard on the display of your choosing, and enjoy the benefits of Sniper EFI 2. Sniper EFI 2 is a high-performance electronic fuel injection system designed for a wide range of engines and horsepower goals. It provides improved engine performance, better fuel efficiency, and easier starting, making it the perfect upgrade for any enthusiast looking to take their ride to the next level. With its easy installation and advanced technology, the Sniper EFI 2 is the ultimate fuel injection system for any conventional V8 engine.


    Holley Sniper EFI Eliminates the need to rewire your existing Sniper EFI installation 558-489


    Specifications:

    Brand Holley Sniper EFI
    Category Engine
    342 4
    Emission Code 3
    4502 Female
    4503 Female
    3390 Performance
    part type Engine Control Module (ECM) Wiring Harness
    Product Type Harness
    Sub Category Wire, Cable and Related Components
    Warning California Proposition 65
    Brand Holley Sniper EFI
    Category Engine
    342 4
    Emission Code 3
    4502 Female
    4503 Female
    3390 Performance
    part type Engine Control Module (ECM) Wiring Harness
    Product Type Harness
    Sub Category Wire, Cable and Related Components
    Warning California Proposition 65
    Description_INV SNIPER 2 TO SNIPER 1 ADAPTER HARNESS
    Description_DES Sniper 1 to Sniper 2 EFI Adapter Harness
    Description_EXT Eliminates the need to rewire your existing Sniper EFI installation
    Description_MKT Want to make the switch from the original Sniper EFI to Sniper 2 and don't want to rewire your system? This harness is designed to do exactly that! The Sniper adapter harness is a plug-and-play solution to connect your existing Sniper 1 wiring harness to a Sniper 2 throttle body. This can be used with any Sniper 2 system that is not equipped with a power distribution module (PDM). Remove your Sniper EFI throttle body from the intake manifold, unplug all of the connectors, and plug the Sniper EFI 2 adapter harness into your existing main harness. Cycle your ignition key, run a fresh wizard on the display of your choosing, and enjoy the benefits of Sniper EFI 2. Sniper EFI 2 is a high-performance electronic fuel injection system designed for a wide range of engines and horsepower goals. It provides improved engine performance, better fuel efficiency, and easier starting, making it the perfect upgrade for any enthusiast looking to take their ride to the next level. With its easy installation and advanced technology, the Sniper EFI 2 is the ultimate fuel injection system for any conventional V8 engine.
    Description_FAB One step, plug and play upgrade from your existing Sniper EFI install to a Sniper 2 throttle body
    Description_FAB Eliminates the need to rewire your existing Sniper EFI installation
    Description_FAB Wiring harness included with the Sniper 2 kit will not be used. This adapter is intended to be used with the original Sniper EFI wiring harness and new Sniper 2 EFI throttle body.
    Description_FAB Sniper 2 EFI Benefits:
    Description_FAB (NEW) Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires)
    Description_FAB (NEW) "Hidden Harness" wiring harnesses exits from the rear of throttle body for a clean appearance
    Description_FAB (NEW) Inputs and outputs consist of: 2x Ground Inputs, 2x Ground Outputs, 1x TPS output (0-5V) and 1x Tach Output
    Description_FAB (NEW) Next Generation mil-spec style M8 positive lock connector for CAN1 and CAN2 provides the latest in CAN bus technology for a simple yet robust connection
    Description_INV SNIPER 2 TO SNIPER 1 ADAPTER HARNESS
    Description_DES Sniper 1 to Sniper 2 EFI Adapter Harness
    Description_EXT Eliminates the need to rewire your existing Sniper EFI installation
    Description_MKT Want to make the switch from the original Sniper EFI to Sniper 2 and don't want to rewire your system? This harness is designed to do exactly that! The Sniper adapter harness is a plug-and-play solution to connect your existing Sniper 1 wiring harness to a Sniper 2 throttle body. This can be used with any Sniper 2 system that is not equipped with a power distribution module (PDM). Remove your Sniper EFI throttle body from the intake manifold, unplug all of the connectors, and plug the Sniper EFI 2 adapter harness into your existing main harness. Cycle your ignition key, run a fresh wizard on the display of your choosing, and enjoy the benefits of Sniper EFI 2. Sniper EFI 2 is a high-performance electronic fuel injection system designed for a wide range of engines and horsepower goals. It provides improved engine performance, better fuel efficiency, and easier starting, making it the perfect upgrade for any enthusiast looking to take their ride to the next level. With its easy installation and advanced technology, the Sniper EFI 2 is the ultimate fuel injection system for any conventional V8 engine.
    Description_FAB One step, plug and play upgrade from your existing Sniper EFI install to a Sniper 2 throttle body
    Description_FAB Eliminates the need to rewire your existing Sniper EFI installation
    Description_FAB Wiring harness included with the Sniper 2 kit will not be used. This adapter is intended to be used with the original Sniper EFI wiring harness and new Sniper 2 EFI throttle body.
    Description_FAB Sniper 2 EFI Benefits:
    Description_FAB (NEW) Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires)
    Description_FAB (NEW) "Hidden Harness" wiring harnesses exits from the rear of throttle body for a clean appearance
    Description_FAB (NEW) Inputs and outputs consist of: 2x Ground Inputs, 2x Ground Outputs, 1x TPS output (0-5V) and 1x Tach Output
    Description_FAB (NEW) Next Generation mil-spec style M8 positive lock connector for CAN1 and CAN2 provides the latest in CAN bus technology for a simple yet robust connection


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    Shipping Policy Last Updated: April 2026

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    Order Cancellations

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    We will respond with a shipping quote as quickly as possible. Please note that customs duties, import taxes, and any other fees charged upon delivery are the sole responsibility of the recipient and are not included in your shipping quote. We recommend checking with your local customs office before placing your order.

    Off-Road Use Disclaimer

    All products are sold for off-road use only unless otherwise specified. The buyer assumes full responsibility for installation and operation. Berry Performance Sales is not liable for any incidental, indirect, or consequential damages including engine failure, labor charges, or vehicle downtime resulting from the use of any product sold. By placing an order, you acknowledge and accept these terms.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    Return Policy

    Returns & Refunds Last Updated: April 2026

    We want you to love what you ordered. If something isn't right, here's everything you need to know.

    30-Day Return Window

    You have 30 days from the date of purchase to initiate a return. After this window, we are unable to accept returns. We do not offer exchanges — all approved returns are refunded per the terms below.

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    Custom ordered products are non-returnable. If you're unsure whether your item qualifies, contact us before purchasing.

    Once we receive your return, we will inspect the item before processing any refund. We reserve the right to deny or adjust your refund if the item is received in a condition that differs from what was originally shipped — including signs of use, missing parts, or damage that occurred after delivery.

    Fees to Know Upfront

    We believe in being transparent about costs:

    • Restocking Fee: 20% — deducted from all return refunds
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    • Cancellation (Installment/Payment Plan): 7% fee to cover transaction costs
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    When contacting us, please include:

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    If your item was damaged during shipping, this is handled as a carrier claim separate from our standard return process — we will assist you in filing that claim. Items confirmed to be defective due to a manufacturing or fulfillment error will have return shipping costs covered by Berry Performance Sales.

    Refunds

    Once we receive and inspect your return, refunds are processed within 3–5 business days back to your original payment method. You'll receive a confirmation once it's been issued.

    Questions?

    We're happy to help before, during, or after your purchase. Email: sales@berryperformancesales.com

    Berry Performance Sales reserves the right to update this policy at any time. Changes take effect immediately upon posting. It is the customer's responsibility to review the current policy at the time of purchase.

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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