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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Ships within 48 hours · Estimated delivery Jul 28 - Aug 2

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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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4.5 ★★★★★
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Tiny dog Mom
Alexandria, US
★★★★★ 5
Just right
Size: Queen - 18" X 28", Number of Items: 2
Comfy and just right
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
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How hard can it be?
Lowell, US
★★★★★ 3
Something changed?
Size: King - 19" X 34", Number of Items: 2
I ordered these last year and loved them! Not too soft not too firm. I accidentally left mine (my favorite pillow) at an Airbnb. I wanted to replace it and all that was left was this two pack. These are quite softer than the first ones I ordered. Really disappointing as they were my favorite.
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Reviewed in the United States on June 6, 2026
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runnelsrocks
Whiting, US
★★★★★ 5
Just give them a little bit of extra time to fluff they will
Size: Standard - 18" X 26", Number of Items: 2
Whatever you do just give it time. When I first open the package of pillows I purchased for they were super flat and for the next couple days they didn't seem to fluff and I was going to do a return. I waited about a week and Amanda these things fluff up and they are nice and sturdy now. I'm glad I waited and gave them time worth the purchase. Recommend
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Reviewed in the United States on March 25, 2026
E
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Emm!
Lowell, US
★★★★★ 5
A product that will make a difference!
Color: White, Size: King (Pack of 2)
These king-size pillows are incredibly comfortable and supportive. They are soft enough to feel luxurious, yet they provide great support for my head and neck throughout the night. The king size is perfect for a larger bed and gives the bed a full, hotel-like appearance. The pillows keep their shape well and fluff up nicely after use. I've been sleeping much better since getting them and would definitely recommend them to anyone looking for quality, comfortable pillows.
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Reviewed in the United States on June 3, 2026
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Roman P
Houston, US
★★★★★ 5
A must have♥️❤️
Color: White, Size: King (Pack of 4)
These pillows are amazing They’re plush and extremely comfortable. I love them.
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Reviewed in the United States on June 9, 2026

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