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EFI / Electronic Fuel Injection Systems

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Results 51 - 69 of 69

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-511-3XR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-511-3XR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-511-3XR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, 3.5 in. Display, Kit

Part Number: SNE-550-511-3XR

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-511-5PD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-511-5PD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-511-5PD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, PDM, 5 in. Display, Kit

Part Number: SNE-550-511-5PD

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-510-5XR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-510-5XR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-510-5XR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, 5 in. Display, Kit

Part Number: SNE-550-510-5XR

Not Yet Reviewed

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

This product may not be eligible for select promotional offers

Holley Sniper EFI Stealth 4150 Fuel Injection Systems 550-872

Holley Sniper EFI Stealth 4150 Fuel Injection Systems 550-872

Holley Sniper EFI Stealth 4150 Fuel Injection Systems 550-872

Fuel Injection Systems, Sniper EFI, Stealth 4150, 650 HP Max, Throttle Body, Gold, 4150 Flange, Injectors, Wiring Harness, Tuner, Kit

Part Number: SNE-550-872

3.33 out of 5 stars ( 3 )

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-3PD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-3PD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-3PD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, PDM, 3.5 in. Display, Kit

Part Number: SNE-550-510-3PD

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Inline Pump Fuel Injection Systems 550-511-BXK

Holley Sniper 2 EFI 650 HP Inline Pump Fuel Injection Systems 550-511-BXK

Holley Sniper 2 EFI 650 HP Inline Pump Fuel Injection Systems 550-511-BXK

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Inline Pump, Bluetooth, Kit

Part Number: SNE-550-511-BXK

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-510-BXD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-510-BXD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-510-BXD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, Bluetooth, Kit

Part Number: SNE-550-510-BXD

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-511-BPR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-511-BPR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-511-BPR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, PDM, Bluetooth, Kit

Part Number: SNE-550-511-BPR

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-510-BPR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-510-BPR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-510-BPR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, PDM, Bluetooth, Kit

Part Number: SNE-550-510-BPR

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-511-BXR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-511-BXR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-511-BXR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, Bluetooth, Kit

Part Number: SNE-550-511-BXR

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Inline Pump Fuel Injection Systems 550-510-BXK

Holley Sniper 2 EFI 650 HP Inline Pump Fuel Injection Systems 550-510-BXK

Holley Sniper 2 EFI 650 HP Inline Pump Fuel Injection Systems 550-510-BXK

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Inline Pump, Bluetooth, Kit

Part Number: SNE-550-510-BXK

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-511-BPD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-511-BPD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-511-BPD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, PDM, Bluetooth, Kit

Part Number: SNE-550-511-BPD

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-510-5PR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-510-5PR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems with Power Distribution Module 550-510-5PR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, PDM, 5 in. Display, Kit

Part Number: SNE-550-510-5PR

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-BPD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-BPD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-BPD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, PDM, Bluetooth, Kit

Part Number: SNE-550-510-BPD

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-511-BXD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-511-BXD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-511-BXD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, Bluetooth, Kit

Part Number: SNE-550-511-BXD

Not Yet Reviewed

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-5PD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-5PD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems with Power Distribution Module 550-510-5PD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, PDM, 5 in. Display, Kit

Part Number: SNE-550-510-5PD

Not Yet Reviewed

Estimated Ship Date: Dec 23, 2025 if ordered today

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Estimated Ship Date: Dec 23, 2025 if ordered today

This product may not be eligible for select promotional offers

Need It Sooner? We recommend these similar substitute parts:

FiTech Go EFI 4 600 HP Self-Tuning Fuel Injection Systems 30002

FiTech Go EFI 4 600 HP Self-Tuning Fuel Injection Systems 30002

4.25 out of 5 stars ( 170 )

Estimated Ship Date: Monday 12/1/2025

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Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-510-BXR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-510-BXR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-510-BXR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, Bluetooth, Kit

Part Number: SNE-550-510-BXR

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

...Loading

Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-511-5XR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-511-5XR

Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-511-5XR

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Black, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, 5 in. Display, Kit

Part Number: SNE-550-511-5XR

Not Yet Reviewed

Estimated Ship Date: Monday 12/1/2025

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Estimated Ship Date: Monday 12/1/2025

This product may not be eligible for select promotional offers

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-510-5XD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-510-5XD

Holley Sniper 2 EFI 650 HP Returnless Fuel Injection Systems 550-510-5XD

Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Returnless Pump, 5 in. Display, Kit

Part Number: SNE-550-510-5XD

Not Yet Reviewed

Estimated Ship Date: Dec 22, 2025 if ordered today

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Estimated Ship Date: Dec 22, 2025 if ordered today

This product may not be eligible for select promotional offers

Related Articles

3 Reasons to Consider a Self-Learning Fuel Injection System Tech Article

3 Reasons to Consider a Self-Learning Fuel Injection System

Tuning is rewarding when you want to do it, but aggravating when you have to do it. Today’s self-learning fuel injection systems give us the best of both worlds. The injection units quickly learn what the engine wants to run at its best and offers additional tools for those who like to tinker.

Example images of throttle body and multi-port EFI kits Tech Article

Which fuel injection kit is right for me?

If you’re tired of messing with jets and needles, replacing your carburetor with a Fuel Injection System has never been easier. If you make the right choices, the system will work great with engine you have today. It can also support your planned upgrades.

Carbureted vs. EFI: Fuelab Tech Article

Carbureted vs. EFI: Fuelab Examines How Fuel Line Size Relates to Fuel Pressure Drop (and Why it Matters)!

Does size really matter when it comes to fuel lines? According to the fuel delivery system experts at Fuelab, it does. It’s because fuel line size and length have a direct effect on the amount of fuel pressure drop your fuel system will experience.

How do I pick the right size fuel injection kit? Tech Article

How do I pick the right size fuel injection kit?

EFI Kits are rated by the maximum horsepower they support with gasoline. But what about the smallest engine a system can support? Choosing an EFI system that’s too big will result in poor idle and bad throttle response, same as a carburetor. Keep reading to learn what affects these ratings and how to pick the right kit for your motor.

Can I run a turbocharger, supercharger, or nitrous oxide with my fuel injection kit? Tech Article

Can I run a turbocharger, supercharger, or nitrous oxide with my fuel injection kit?

Power adders like nitrous, turbochargers, and superchargers are a natural fit with EFI. If you want to use power adders now or in the future, buy an EFI kit that is Power Adder Compatible from the start. A power adder compatible kit will work fine with or without boost or nitrous, and it might be impossible to make a non-compatible kit work with power adders. Unfortunately, not all power adder compatible kits are created equal. They usually have:

Can I use a fuel injection kit to control ignition timing? Tech Article

Can I use a fuel injection kit to control ignition timing?

Most fuel injection kits will work with your existing ignition system. All they really need is a tach signal. Ignition Timing Advance can be handled Mechanically and/or with Vacuum, just like with a carburetor.

An example of 2 different in-tank style fuel pumps. Tech Article

What type of electric fuel pump should I use?

Electric fuel pumps come in three basic types. As long as a fuel pump provides the Flow Rate your engine needs at the pressure your Fuel Injected or Carbureted system requires, it will work just fine. It is just a matter of deciding which one works best for your installation.

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