SKU: 46509482438

Holley Sniper 2 EFI Self-Tuning Fuel Injection System Master Kit # HO550-511-3PK

Sale price$1653.75 Regular price$1837.50
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Description

Holley Sniper 2 EFI Self-Tuning Fuel Injection System Master Kit # HO550-511-3PKFuel Injection Systems, Sniper 2 EFI, Self Tuning, Throttle Body, Black, 4150 Flange, 800 cfm, Fuel Pump, External Fuel Regulator, 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: Yes ECM Included: Yes Self Tuning: Yes User Tunable: Yes Fuel Pump Included: Yes EGR: No Transmission Controller Included:

Fuel Injection Systems, Sniper 2 EFI, Self-Tuning, Throttle Body, Black, 4150 Flange, 800 cfm, Fuel Pump, External Fuel Regulator, 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:

Yes

ECM Included:

Yes

Self Tuning:

Yes

User Tunable:

Yes

Fuel Pump Included:

Yes

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:

Black ceramic

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 2 EFI Self-Tuning Fuel Injection Systems

Holley Sniper 2 EFI self-tuning fuel injection systems are perfect for street rods, muscle cars, off-road trucks, or nearly any carbureted vehicle. They can put an end to cold start issues, hesitations, vapor lock, and flooding. The systems are available in standard tuning kitsor the Master kit that includes an external fuel pump. Choose from a polished or satin black finish on the throttle body.

Additional product features:

* Dual pattern bolt on carburetor replacement, designed to fit 4150 flange and spread bore manifolds
* Throttle body mounted ECU no extra boxes to mount
* Supports up to 650 hp with four 100 lb.-hr. injectors
* Only 4 wiring connections required (battery +, battery -, switched ignition, and RPM)
* Integrated ignition timing control and coil driver
* High-resolution full-color touch screen 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 and Master kits (Master kits include complete fuel system, consisting of 20 ft. of 3/8 in. 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 real-time fuel map learn
* OEM-style TPS/IAC and fuel pressure regulator for 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

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: 46509482438

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4.1 ★★★★★
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Verified Purchase
GA
Boise, US
★★★★★ 5
So good we ordered more — flawless WiFi upgrade
Size: 2 Pack, Style: Wi-Fi 7 BE5000
The TP-Link Deco BE25 (Deco 7) Dual-Band BE5000 WiFi 7 Mesh system has been an absolute game changer for our home network. Setup was surprisingly simple, and within minutes we had strong, stable coverage throughout the entire house. Dead zones we used to struggle with are completely gone. The signal stays consistent even when moving between floors and rooms, which makes a huge difference for streaming, video calls, and smart devices. Speed and reliability have both been noticeably improved. Everything feels faster and more responsive, especially with multiple devices connected at once. The app is also easy to use for managing settings and monitoring the network. It worked so well that we ended up ordering more units to expand coverage even further. That really says it all—this system just works, and it works well. Highly recommended for anyone looking to upgrade their home WiFi to something truly reliable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
R
Verified Purchase
Ryan
Charlottesville, US
★★★★★ 5
Plug & Play - Stable Fast Network
Size: 3 Pack, Style: Wi-Fi 7 BE5000, Size: 3 Pack, Style: Wi-Fi 7 BE5000
I replaced a previous version of these Deco mesh routers (X55)- installed my previous ones at my in laws and upgraded myself with these. It was truly plug-and-play, and I have all of them wired backhaul. The only couple things that surprised me was the size. They are much larger than they appear in the pictures. The other is the LED control. I like the previous version you cannot individually control the LEDs for these so it’s all or nothing. I upgraded the unmanaged switch at my patch panel that wires the house with 2.5gb, making sure that the backhaul on these was as possible. By this point I’ve had them for about six months and I’ve had zero downtime. My wife and I are both professionals. I work from home and have never once had a disruption so the reliability has been perfect. All my devices were able to connect without issue and I have about 78 total wireless devices across my 4000 square-foot house. Even my devices that control sprinkler systems in my yard connect great. Until I get about 100 yards from my house (way in the backyard). Meaning the compatibility and range are top-notch. My Internet speed is only 1 gb at the moment, but I wanted something more future proof since my ISP has up to 10 available. I definitely recommend this product and actually all of the deco mesh systems.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
I
Verified Purchase
Isabel Perez
Waukegan, US
★★★★★ 5
Finally Fixed the Dead Zones in My House
Size: 3 Pack, Style: Wi-Fi 7 BE5000
I bought this after getting tired of dealing with weak Wi-Fi in certain parts of the house, and the difference was noticeable almost immediately. Setup was much easier than I expected and only took a few minutes. Before installing it, video calls would freeze, pages would take forever to load, and some devices would randomly disconnect when moving farther from the router. Since adding this mesh extender, the connection has been much more consistent and I’m getting coverage in areas that barely had a signal before. I also like that devices seem to switch between the router and extender smoothly without me having to think about it. If you're struggling with dead spots or unreliable Wi-Fi, this has been a worthwhile upgrade.
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Reviewed in the United States on May 28, 2026
D
Verified Purchase
D. C. Hill
Lowell, US
★★★★★ 5
Very outdoor. Outstanding outdoor Wi-Fi — perfect companion for Starlink (even in winter!
Size: 1 Pack Outdoor, Style: Wi-Fi 7 BE5000, Size: 1 Pack Outdoor, Style: Wi-Fi 7 BE5000
I’m using this as the main router at an off-grid cabin, connected directly to a Starlink Mini, and it has been phenomenal. The coverage and stability are far better than the built-in Starlink Wi-Fi router, especially outdoors and around multiple buildings. This unit serves as the primary node in my network, with a few Deco M5 units extending the mesh, and the handoff between them is seamless. I’m getting reliable coverage over roughly 3 acres, including around the cabin, outbuildings, and yard — something the Starlink router couldn’t come close It’s mounted outdoors and has gone through freezing winter conditions with snow, ice, and icicles forming around it — zero issues so far. Performance hasn’t dropped, and it’s stayed rock solid. Setup was straightforward, management through the app is easy, and once it’s running you basically forget about it — which is exactly what i want. If you’re running Starlink at a rural property, cabin, farm, or large yard, this is an excellent upgrade and easily worth it. Strong signal, wide coverage, and dependable even in harsh conditions. Highly recommended..!.
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Reviewed in the United States on January 31, 2026
I
Verified Purchase
Its8up
Fort Morgan, US
★★★★★ 5
Great signal throughout the house and beyond
Size: 3 Pack, Style: Wi-Fi 7 BE5000
Got this set of 3 to replace the single rental EERO that the service provider put in when my mom got fiber. My biggest issue with the EERO was that the service provider set it up, meaning I had no way to control the device. Specifically, my mom is old and apt to click on scam ads or to call the number when a scam popup freezes her keyboard (thanks a lot, Zuckerberg). The only layer of protection I can give her is an adblock DNS, and to do so I need control. Also, I could not get her living room TV to connect to WiFi and signal was starting to drop off a bit in rooms farthest from that single device. At the time of purchase, this was the most economical 3 mesh device WiFi 7 system from a well established brand. The devices are a bit bulky, but are not eye sores and seem to be very well made. The available wall mount brackets for this style router appear to be more secure than the ones for the cylindrical models, and they won't look as goofy hanging on the wall which is another plus. Mounting brackets are sold separately. Her TV still does not connect to WiFi, so placed one of these near the TV and connected it via ethernet cable. The third is in one of the rooms farthest from the main base. The range is quite acceptable, with my phone getting full signal strength in the yard @ >50' from the house in some places. During setup, was given the option to set up MLO WiFi, aka Multi-Link Operation, which creates a second WiFi network that may provide higher throughput than the basic WiFi connection. It is not compatible with all devices, so likely best practice to connect lower need or 'potato quality' devices to the lower throughput base network (phones, TVs, tablets, guests, etc.). The fiber speed is around 300mbps. After extensive Speed Test usage to the point that they stopped allowing me to run Speed Test, both the Base WiFi and MLO WiFi performed similarly with possibly 10-20mbps higher average via MLO. My guess is that MLO may only be truly useful for gigabit connections. Going straight WiFi with these things doesn't add any significant latency or noticeable drop in throughput in my situation, but could be a concern in larger homes and/or when more walls/junk/metal is between mesh devices. Each of these has 2 ethernet ports, and hardwiring them together with ethernet cable will provide the strongest/fastest connection between mesh devices. The theoretical maximum reliable length is 328' (100 meters) for ethernet cable, so quality Cat6 cable could really put some distance between the main base and the 3rd mesh station (possibly with some WiFi dead spots in between). This is not unique to this system, as most mesh devices have 2 or more ethernet ports.
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Reviewed in the United States on October 8, 2025

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