SKU: 4396028248

Holley Sniper EFI Self-Tuning Kit Handheld EFI Monitor & Pump Black # HO550-511D

Sale price$1572.75 Regular price$1747.50
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Description

Holley Sniper EFI Self-Tuning Kit Handheld EFI Monitor & Pump Black # HO550-511DHolley Sniper EFI Self Tuning Kit Handheld EFI Monitor & Pump Black # HO550 511D Fuel Injection System, Sniper EFI, Self Tuning, Throttle Body, Black, 4150 Flange, 800 cfm, Fuel Pump, In Tank, Fuel Regulator, Tuner Unit, Kit Fuel Injection Style: Throttle body Fuel Injection System Type: Single 4 Barrel Throttle Body (4150 Flange) Maximum Horsepower with Gas: 650 Timing Control Compatible: Yes Power Adder Compatible: No ECM Included: Yes Self Tuning:

Holley Sniper EFI Self-Tuning Kit Handheld EFI Monitor & Pump Black # HO550-511D
Fuel Injection System, Sniper EFI, Self-Tuning, Throttle Body, Black, 4150 Flange, 800 cfm, Fuel Pump, In-Tank, Fuel Regulator, Tuner Unit, Kit
Fuel Injection Style:
Throttle body
Fuel Injection System Type:
Single 4-Barrel Throttle Body (4150 Flange)
Maximum Horsepower with Gas:
650
Timing Control Compatible:
Yes
Power Adder Compatible:
No
ECM Included:
Yes
Self Tuning:
Yes
User Tunable:
Yes
Fuel Pump Included:
Yes
Fuel Pump Flow Rating (lph):
340
EGR:
No
Transmission Controller Included:
No
Metering Style:
Speed density
Intake Manifold Included:
No
Multi-Port Fuel Rails Included:
No
Throttle Body Included:
Yes
Throttle Body Mounting Flange:
4-barrel square bore
Venturi Quantity:
4
Airflow Rate (cfm):
800 cfm
Throttle Body Material:
Cast aluminum
Throttle Body Finish:
Satin black
Injectors Included:
Yes
Injector Size (lbs/hr):
100 lbs./hr.
Calibration Module Included:
Yes
Wiring Harness Included:
Yes
Oxygen Sensor Included:
Yes
Fuel Pressure Regulator Included:
Yes
Distributor Included:
No
MAP Sensor Included:
Yes
IAT Sensor Included:
Yes
TPS Sensor Included:
Yes
IAC Motor Included:
Yes
Quantity:
Sold as a kit.
Holley Sniper EFI Returnless Self-Tuning Fuel Injection Systems
If you want to convert to Sniper EFI, but don't like the idea of mounting an external fuel pump, look to Holley Sniper EFI returnless self-tuning fuel injection systems as the solution. These drop-in kits make plumbing your Sniper EFI installation as hassle-free as possible. The Sniper EFI Master kits combine their self-learning throttle body with an easy-to-install, in-tank retrofit returnless module, 20 ft. of Earl's Vapor Guard fuel hose, and the required fittings. The included fuel system places a 340 lph fuel pump in the tankwhich can be easily accomplished with basic hand tools.Holley Sniper EFI Returnless Self-Tuning Fuel Injection systems include: Available finishes: black ceramic, classic gold, and shiny Throttle body-mounted ECU; no extra boxes to mount Supports up to 650 hp with four 100 lb.-hr. injectors Only four wiring connections required: battery +, battery -, switched ignition, and rpm Integrated ignition timing control and coil driver Simple calibration wizard and self-tuning ECUno laptop required Dual-pattern bolt-on carburetor replacement, designed to fit 4150 flange and spread bore manifolds (Spread Bore Sealing Platepart 9006recommended) No external fuel return line required High-resolution full color touch screen for initial setup, tuning, and gauge displays OEM-style TPS/IAC and fuel pressure regulatorfor years of dependable service Included clamp-on oxygen sensor kit ensures a leak-free oxygen sensor installation, with stainless steel T-bolt clamps and a stainless steel (weldable) oxygen sensor flange Genuine Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learn Includes complete fuel system: Sniper EFI retrofit returnless fuel module; 20 ft. of 3/8 in. Vapor-Guard fuel hose; 5 stainless steel hose clamps; a post filter; and various Earl's fittings and capsSniper Returnless Retrofit Fuel Module details: Sniper retrofit fuel module installs in any fuel tank from 7 to 12 in. deep Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (preset to 58.5 psi) The low-profile design is only 1.275 in. thick above the tank mounting surface The innovative clamping system allows you to locate the module anywhere in the tank beside your existing sending unit The clamping system allows you to rotate the unit 360 degrees for easier clocking of the plumbing and wiring locations under your ride Diecast aluminum construction for corrosion resistance and long-lasting good looks 1/4 in. NPT ports for a wide variety of plumbing options
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: 4396028248

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4.4 ★★★★★
Based on 22 reviews
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Steve Hall
Massapequa, US
★★★★★ 5
Husky Approved
Size: Large, Color: 5 Pack
Okay, so my husky, bless his cotton socks, thinks he's a furry little demolition crew. Usually, plush toys last about five minutes before they're disemboweled, leaving a fluffy white crime scene all over my living room. BUT! These Sharlovy toys are a game changer! They're stuffing-free, which is a HUGE win for my sanity (and my vacuum cleaner). He can happily gnaw away, trying to get to that squeaker (and succeeding, eventually, because, husky), but without the usual explosion of fluff. Five stars for saving me from a lifetime of stuffing-related stress. If you have a chewer, give these a try. Your house (and your head) will thank you.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
E
Verified Purchase
ELJ
Boise, US
★★★★★ 3
not durable.
Size: Large, Color: 5 Pack
My dog devoured these in 60 seconds - completely shredded
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
A
Verified Purchase
Amy Fulgham
Grantham, US
★★★★★ 5
No Mess, Lots of Fun!
Size: Large, Color: 5 Pack
My dog absolutely loves these toys! The squeakers and crinkle sounds keep him entertained for hours, and I appreciate that they have no stuffing—so no messy cleanup when he plays a little rough. The variety pack is great because it gives him different animals to choose from, and the toys are surprisingly durable even with lots of chewing. They’re lightweight, easy for him to carry around, and perfect for playtime or keeping him busy when I’m working. Definitely a great value for the price, and I’ll be buying again when he wears them out. Highly recommend!
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Reviewed in the United States on August 21, 2025
H
Verified Purchase
Henry A. Munford
Belleville, US
★★★★★ 5
Great
Size: Large, Color: 5 Pack
These are big deal toys for our dogs. Use them when have to go out for a whole day. Have bought three sets over about two years. Takes them a several days to gut and get to the squeaker. They keep the skin around for months if we let them.
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Reviewed in the United States on March 10, 2026
F
Verified Purchase
F. S. H.
New York, US
★★★★★ 5
Dogs love them!
Size: Large, Color: 5 Pack
May dogs loved these. The squeaks last long enough but get lots of wear and tear. Worth money for the fun. My dog is 12 and still enjoys perfect size, weight, and flexibility.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026

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