Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-510-5XR System, 2, Self-Tuning, Throttle body, Polished, 4150 Flange, hp Max, 800 CFM, Return Style Pump, 5 in. Display, Kit
Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems 550-510-5XR System, 2, Self-Tuning, Throttle body, Polished, 4150 Flange, hp Max, 800 CFM, Return Style Pump, 5 in. Display, Kit
A$4,809.37
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Description
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:43:50
Features
Vehicle Compatibility and Return Conditions.
This item was designed and engineered in the USA for US domestic vehicles. OBD tools, ECUs, dongles, programmers, and tuners may have limited compatibility with vehicles outside the USA due to regional differences in emission standards and system configurations. Some features and functionality may vary depending on the vehicle and location.
Some electronic tuning devices and programmers require activation, registration, or pairing with a specific vehicle’s VIN (Vehicle Identification Number). Once activated or paired, these devices may become permanently associated with that vehicle, restricting or preventing their use on another vehicle, resticting our ability to offer returns or exchanges.
Please review the product details and images to ensure it meets your needs. For clarification or assistance, feel free to contact a StreetFX agent. Note: Returns are not accepted for special order or tuning products unless the unit is deemed faulty.
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Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Holley Sniper, Sniper, Sniper (holley), Sniper Efi |
| StreetFX SKU | sne550-510-5XR |
| SFX Item ID | 5014026 |
| Accounting SKU | sne-550-510-5XR |
| Manufacturer SKU | 550-510-5XR |
| Manufacturer UPC | 090127863336 |
| Alternative References | 550-510-5XR, SNE-550-510-5XR, SNI550-510-5XR |
Fuel Injection System, Sniper 2, Self-Tuning, Throttle body, Polished, 4150 Flange, 650 hp Max, 800 CFM, Return Style Pump, 5 in. Display, Kit
Holley Sniper 2 EFI Return-Type Fuel Injection Systems are self-tuning, easy-to-install, EFI conversions for 4-barrel (4150 flange) style carburetors. They took everything that they learned from the original Sniper EFI system and added new features that will make your EFI conversion more simple, reliable, and modern. Like all Sniper EFI systems, Sniper 2 is designed to work with the Sniper Ecosystem that includes Hyperspark ignition, complete fuel systems, multiple user interfaces/dash displays, and more.
Make your classic drive like a modern fuel-injected vehicle, with easy cold starts, smooth drivability, and improved fuel economy! Sniper 2 is designed to be installed at home in your garage with limited tools and the support of Holley's comprehensive installation manual and videos. The user-friendly setup wizard allows you to answer a few simple questions about your engine—and the system will begin self-tuning with no laptop or tuning required. If you're looking for a high-performance fuel injection system that delivers power, efficiency, and ease of use, look no further than the Sniper 2 EFI.
Main features:
• Only 4 wiring connections required: Battery+, Battery-, Switched Ignition, and RPM
• Includes 20 feet of 3/8 in. vapor guard fuel hose, return line, external regulator, filters before/after the pump, fittings/hardware, and a low profile return-type drop-in pump module(1.275-inches above the tank mounting surface) that is designed for universal installation into fuel tanks that range from 7 to 12 in. deep
• Innovative clamping system allows you to locate the module anywhere in the tank beside your existing sending unit and can be rotated 360 degrees for easier clocking.
• Main harness includes plug-and-play HyperSpark distributor support for integrated timing control, making your ignition setup hassle-free
• Wide variety of tuning and gauge display options: from a 3.5 in. full-color LCD hand-held, 5 in. digital dash, or the Bluetooth dongle, which allows you to connect either an iOS or Android based cell phone to your Sniper 2
• Female -6 AN O-ring fittings
• Overall height is only 3.280 in.
• Supports up to 650 hp naturally aspirated or 575 hp on boost with four 100 lbs.-hr. injectors
• Requires 55-65 PSI
• Next generation ECU features improved RF noise and interference resistance (stands up to old car wiring, noisy alternators, faulty plug wires)
• Redesigned throttle shaft and plate geometry for a smoother throttle feel
• Integrated transmission kickdown provisions for GM TH350/400, 200-4R/700R4 and Ford C4/C6 applications
• "Hidden Harness" wiring exit from the rear of throttle body for a clean appearance
• Inputs and outputs consist of: 2x ground inputs, 2x ground outputs, 1x TPS output (0-5 V), and 1x tach output
• Redesigned injector connector for improved reliability
• Onboard contactless magnetic TPS sensor ensures an accurate TPS reading
• Next generation mil-spec style M8 positive lock connector for CAN1 and CAN2 provides the latest in CAN bus technology for a simple yet robust connection
• Cast-in fuel crossover from the primary to secondary fuel rail
• The included Bosch LSU 4.9 wideband oxygen sensor provides real-time fuel map learning
• Included clamp-on oxygen sensor kit ensures a leak-free oxygen sensor install with stainless steel T-bolt clamps and a stainless steel weldable oxygen sensor flange
• Sniper 2 throttle bodies are serialized, which provides an improved experience in the event of any unit needing to be inspected
| Product Attributes | |
|---|---|
| Brand | Holley Sniper |
| Manufacturer's Part Number | 550-510-5XR |
| Part Type | Fuel Injection Systems |
| Product Line | Holley Sniper 2 EFI 650 HP Return-Type Fuel Injection Systems |
| UPC | 090127863336 |
| 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 |
| ECM Included | Yes |
| Self Tuning | Yes |
| User Tunable | Yes |
| Fuel System Included | In-tank fuel pump module, return |
| Fuel Pump Flow Rating (lph) | 340 |
| Ignition System Included | None |
| Power Distribution Included | None |
| User Interface Included | 5 in. display |
| EGR | No |
| Transmission Controller Included | No |
| Metering Style | Speed density |
| 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 Color | 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 |
| MAP Sensor Included | Yes |
| IAT Sensor Included | Yes |
| TPS Sensor Included | Yes |
| IAC Motor Included | Yes |
| Quantity | Sold as a kit. |
| Notes | Kit includes 5 in. display. |
| Special Attention | Includes a universal in-tank electric pump. This style pump requires a return line and will fit tanks 7-12 in. deep. |
Compatibility
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