SKU: 51940756278

Holley Sniper EFI Self-Tuning Kit + Handheld EFI Monitor- Polished # HO550-510

Sale price$877.50 Regular price$975.00
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Description

Holley Sniper EFI Self-Tuning Kit + Handheld EFI Monitor- Polished # HO550-510Holley just brought EFI within range with Sniper EFI! Introducing Sniper EFI! Sniper EFI is economically priced so you can have all the benefits of Fuel Injection and still have money to finish or upgrade the rest of your ride! Perfect for street rods, muscle cars, off road trucks, or nearly any carbureted vehicle. A Sniper EFI system can put an end to cold start issues, hesitations, vapor lock, and flooding. We also offer a full line of Sniper

Holley just brought EFI within range with Sniper EFI! Introducing Sniper EFI! Sniper EFI is economically priced so you can have all the benefits of Fuel Injection and still have money to finish or upgrade the rest of your ride! Perfect for street rods, muscle cars, off-road trucks, or nearly any carbureted vehicle. A Sniper EFI system can put an end to cold start issues, hesitations, vapor lock, and flooding. We also offer a full line of Sniper Hyperspark distributors, Sniper ignition boxes, Sniper coils, and other ignition components for those looking to round out their ride with a complete Sniper EFI, Ignition, and Fuel system! Upgrade to Sniper EFI and get the tactical accuracy of EFI today!
Features:
Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange Spread Bore manifolds - (Spread Bore Sealing Plate Part #9006 is recommended)
Throttle body mounted ECU no extra boxes to mount
Supports up to 650hp with Four 100 Lb/Hr Injectors!
Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition RPM)
Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
Integrated ignition timing control coil driver
High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays.
Simple Calibration Wizard (Answer a few questions about your engine and it creates the base map, then starts tuning on its own!) - NO laptop required!
Self-tuning ECU means you don't have to be a computer/tuning wiz to have EFI!
Available in base master kits (Master kits include complete fuel system consisting of; 20ft of 3/8" Vapor Guard Fuel Hose, 12-920 Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!)
The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn!
OEM Style TPS/IAC and Fuel Pressure regulator, for years of dependable service.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 51940756278

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4.9 ★★★★★
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Andrew B
San Leandro, US
★★★★★ 5
High Quality
Number of Items: 6, Color: Black (6-pairs), Size: Large
High quality and fit great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
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Peter
Lowell, US
★★★★★ 5
Great socks, watch out for bad seller
Number of Items: 6, Color: Black (6-pairs), Size: Medium
The socks are great, comfy, padded where you want it. I used these for work socks; I have a blend of corporate desk life and maintenance work. I like the low cut so my shoes don't rub the back of my ankle but not so high that socks always fall down. Great for running and sports as well. Been using these for years. Buyer beware though of the particular seller Liegnitz Group: They were late shipping, sent me the wrong socks so I sent for a return and they send me the right ones. My return got delivered back to them but they did not process it and did not send out any new ones. They cancelled my order and acted like I got the right ones all along. Buy from a different retailer.
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Reviewed in the United States on November 8, 2024
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Terry Hale
San Leandro, US
★★★★★ 5
Comfortable with perfect fit
Number of Items: 6, Color: White (6-pairs), Size: Medium
I have had these socks for a few weeks now and wear them when running. I have small feet at a men's size 7 and they fit perfectly. Most men's socks are to big for my feet. They are pretty thin but well made and have good cushion. I recommend these for anyone that likes ankle socks for athletic activities.
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Reviewed in the United States on March 19, 2024
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Notimpressed
Charlottesville, US
★★★★★ 4
Husband loves socks
Number of Items: 6, Color: Black (6-pairs), Size: Large
Socks are very comfortable and soft. He got rid of the other ones he had! Also, it was a great price.
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Reviewed in the United States on January 9, 2024
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pena_89
Fort Morgan, US
★★★★★ 5
Good product
Number of Items: 6, Color: Black (6-pairs), Size: Large
Good fit, item as advertised!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026

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