SKU: 99625247574

Holley Sniper 2 EFI Self-Tuning Fuel Injection System # HO550-510-3XX

Sale price$1192.50 Regular price$1325.00
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Description

Holley Sniper 2 EFI Self-Tuning Fuel Injection System # HO550-510-3XXFuel Injection Systems, Sniper 2 EFI, Self Tuning, Throttle Body, Polished, 4150 Flange, 800 cfm, 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: No EGR: No Transmission Controller Included: No Metering Style: Speed density

Fuel Injection Systems, Sniper 2 EFI, Self-Tuning, Throttle Body, Polished, 4150 Flange, 800 cfm, 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:

No

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:

No

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: 99625247574

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Tricia Rees
Los Angeles, US
★★★★★ 5
Westie LOVES this toy
Color: U.S.A, Size: Medium
My pup (Westie) adores this toy. This is actually our second one. The ball itself is resistant but the straps will be obliterated. Would definitely recommend! Totally worth the price!
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Reviewed in the United States on May 11, 2026
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regina
Omaha, US
★★★★★ 3
Not durable
Color: Black/White, Size: Large
If you have a dog who likes to pop things then this toy isn't it. Within 5 min she had this ball popped. It was made to sound like it was durable for this type of thing but it definitely is not so just be aware. Now if you have a dog who doesn't pop things easy then this would be a good toy
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Reviewed in the United States on May 15, 2026
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Billie W
Massapequa, US
★★★★★ 5
They last quite well, even out in weather.
Color: Black/White, Size: Medium
NY corgi loves these!
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Reviewed in the United States on May 31, 2026
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Joyce S.
Chelsea, US
★★★★★ 5
Dog can't pop it!
Color: Black/White, Size: Medium
Great toy would buy again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 17, 2025
E
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Elaine Laventure
Natrona Heights, US
★★★★★ 4
WHAT I LEARNED
Color: U.S.A, Size: Medium
i AM NOT SURE THAT 4 STARS IS A FAIR SCORE, MY DOG IS AN AGGRESSIVE CHEWER, NEEDLESS TO SAY WITHIN 2 DAYS ALL THE TABS WERE OFF, BUT THERE WERE NUBS LEFT AND SHE CAN USE THAT. HERE IS A WHAT NOT TO DO, BRING IT TO THE DOG PARK, THEY ALL HAVE A BLAST BUT IF YOUR A BULLY/PIT MIX AND DECIDE TO SINK THEIR TEETH INTO IT, IT DOES DEFLAT. LESSONS LEARNED STILL A FUN TOY.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026

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