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 27 - Aug 1

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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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4.3 ★★★★★
Based on 25 reviews
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A
Verified Purchase
Amazon Customer
Cuba, US
★★★★★ 5
Super comfortable
Size: 8, Color: White
These are high quality fabric.. Not thin and flimsy buy good fabric. Fit me like a glove. I love them and they are very comfortable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
I
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Isabel
Grantham, US
★★★★★ 4
Size down.
Size: 8 Long, Color: Iced Blue Light Wash
They are high stretch so I would size down from your usual size. I have bought size 10 in their brand and noticed the two previous I've purchased before this one were loose. So when I purchased this one I sized down and they fit good to me. I got long so they are LONG. And the regular would probably fit at your ankle or above. The only reason why I didn’t give it 5 stars was bc I don’t feel it mid rise to me it feels like high rise but I don’t feel them uncomfortable and also THEY ARE NOT SKINNY JEANS. They are straight leg and a tad bit loose so if you want stretch and skinny jeans these are not the ones for you. I only bought them thinking they were like the picture but it’s false advertisement.
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Reviewed in the United States on February 28, 2026
M
Verified Purchase
Maegen Jackson
Whiting, US
★★★★★ 3
These Are NOT Skinny Jeans.
Size: 18, Color: Medium Blue
Unfortunately, I'm having to return mine. I purchased these expecting to receive skinny jeans and these are not skinny jeans. These are a relaxed fit, straight leg jean. I'm not too sure about the stretch because they were so big in the leg, I couldn't really tell how well they do stretch. They feel like a nice quality jean other than the fit and they're comfortable around the waist.
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Reviewed in the United States on October 20, 2025
C
Verified Purchase
Battle Creek, US
★★★★★ 5
Perfect fit for 5'10
Size: 10 Long, Color: White
White jeans size 10 long fit perfectly. Im 5'10 130 pounds Always have trouble with length and overall fit. These were on sale for less than 11$! Material has some stretch, not too much. I'm going to hang to dry don't want any shrinkage. Fit is less tight than an earlier version of these jeans.
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Reviewed in the United States on May 6, 2026
Y
Verified Purchase
Yvette M.
West Palm Beach, US
★★★★★ 5
great fit
Size: 4, Color: White
This is my third buy from this brand. They fit great, I have no problem with them at all, and you can't beat the price. You can dress them up with heels and a nice blouse, or wear them casually. I recommend them.
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Reviewed in the United States on May 4, 2026

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