SKU: 60691114135

Holley Sniper 2 EFI Self-Tuning Fuel Injection System Master Kit # HO550-510-3XK

Sale price$1527.75 Regular price$1697.50
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Description

Holley Sniper 2 EFI Self-Tuning Fuel Injection System Master Kit # HO550-510-3XKFuel Injection Systems, Sniper 2 EFI, Self Tuning, Throttle Body, Polished, 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

Fuel Injection Systems, Sniper 2 EFI, Self-Tuning, Throttle Body, Polished, 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:

Polished

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: 60691114135

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Tru le
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★★★★★ 5
Quick and easy solution tire kit
Size: 36 pcs
This tire repair kit has been great to keep in my EV9, Model 3, Model Y, and Lexus RX for emergencies. The tools feel strong and durable, and it gives me peace of mind during road trips and daily driving. I’m very thankful I had this kit because you will never know something or someone may puncture a hole in your tire! Especially living in California! Saves time and money on specially if you’re out far from home and no time to wait for a tow truck.
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Reviewed in the United States on May 16, 2026
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Danny Kyriazopoulos
Carnegie, US
★★★★★ 5
Worth it
Size: 36 pcs, Size: 36 pcs
Very sturdy . Very professional which is what I need for my mobile repair business . Would of been nice if it had more plugs but it’s all good
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Reviewed in the United States on May 24, 2026
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H. W. Hudson
Battle Creek, US
★★★★★ 5
Works great!
Size: 36 pcs
Works great! Very happy with this purchase. Has everything you need. Easy to follow instructions and works great. I plugged a tire from a nail hole on my Jeep and it worked great. Saved me some big bucks!
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Reviewed in the United States on January 27, 2026
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T. Beard
Pawtucket, US
★★★★★ 5
Very Nice Tire Kit
Size: 36 pcs
Put together very well. Nice little kit - all packed up perfectly for easy storage in your vehicle. Quality zipper pouch and the tools look great in it. I have not fixed a flat tire with it but it is handily placed in my vehicle for such an occasion. Glad I bought it.
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Reviewed in the United States on May 1, 2026
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Ms R
New York, US
★★★★★ 5
Great for many ways on my leather goods!
Size: 16 Fl Oz (Pack of 1)
This stuff got the smell out of a purse I bought that had a chemical smell online. I mean, I try to wash this person all kinds of stuff and couldn't get the stink out of it. I thought I was gonna have to throw it out. I bought this at the last attempt to fix it and it got rid of the smell! I also used it on all my leather shoes, and I cleaned my leather headboard. All shiny and moist now. I know this is for cars, but I don't have any leather seats in my cars. But everything I used it on is clean and smells better.
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Reviewed in the United States on May 2, 2026

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