Holley Sniper EFI 2GC Large Bore Fuel Injection Systems 550-857 Systems, EFI, 2GC, Throttle Body, Gold, Bore, Flange, Injectors, Pressure Regulator, Harness, Tuner, Kit
Holley Sniper EFI 2GC Large Bore Fuel Injection Systems 550-857 Systems, EFI, 2GC, Throttle Body, Gold, Bore, Flange, Injectors, Pressure Regulator, Harness, Tuner, Kit
A$3,188.56
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Description
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:43:53
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.
Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Holley Sniper, Sniper, Sniper (holley), Sniper Efi |
| StreetFX SKU | sne550-857 |
| SFX Item ID | 5014091 |
| Accounting SKU | sne-550-857 |
| Manufacturer SKU | 550-857 |
| Manufacturer UPC | 090127072776 |
| Alternative References | 550-857, SNE-550-857, SNI550-857 |
Fuel Injection Systems, Sniper EFI, 2GC, Throttle Body, Gold, Large Bore, 2GC Flange, Injectors, Pressure Regulator, Harness, Tuner, Kit
Holley Sniper EFI 2GC large bore fuel injection systems let you convert your classic 2GC large bolt pattern carburetor to EFI. These units offer superior throttle response and WOT power over the carb—and you will likely experience increased fuel economy. Put an end to cold start issues, hesitations, vapor lock, and flooding with the accuracy of EFI. You can also use the Sniper EFI 2GC to control the ignition timing, taking electronic fuel injection to the next level. These Holley upgrade systems feature two 100 lb./hr. fuel injectors capable of supporting 350 hp on naturally aspirated engines.
The Sniper EFI systems are also available in a Master Kit option, which includes 20 ft. of fuel hose, two filters, one high-pressure EFI fuel pump, and all required fittings for a complete EFI fuel system conversion. Standard and Master Kit systems are available in a choice of throttle body finishes.
Standard Sniper EFI system features:
• Bolt-on 2GC large bore carburetor replacement
• Universal throttle lever with TH350, 700R4 and 200-4R kickdown provisions
• Throttle body-mounted ECU; no extra boxes to mount
• Only four wiring connections required: Battery +, battery -, switched ignition, and rpm
• Internal fuel pressure regulator eliminated the hassle of plumbing an external fuel pressure regulator (preset to 58.5 psi)
• Integrated ignition timing control (with MSD Pro Billet, Holley Dual Sync, or Holley Hyperspark distributors)
• 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
• 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 for 2 in. exhaust ensures a leak-free oxygen sensor installation, with stainless steel T-bolt clamps and a stainless steel (weldable) oxygen sensor flange
• Systems are an ideal conversion for 1974-78 Chevrolet, GMC, Oldsmobile, and Pontiac vehicles that came with a Rochester 2GC large bore carburetor.
| Product Attributes | |
|---|---|
| Brand | Holley Sniper |
| Manufacturer's Part Number | 550-857 |
| Part Type | Fuel Injection Systems |
| Product Line | Holley Sniper EFI 2GC Large Bore Fuel Injection Systems |
| UPC | 090127072776 |
| Fuel Injection Style | Throttle body |
| Fuel Injection System Type | Single 2-Barrel Throttle Body (2GC Flange) |
| Maximum Horsepower with Gas | 350 |
| Timing Control Compatible | Yes |
| ECM Included | Yes |
| Self Tuning | Yes |
| User Tunable | Yes |
| EGR | No |
| Transmission Controller Included | No |
| Metering Style | Speed density |
| Multi-Port Fuel Rails Included | No |
| Throttle Body Included | Yes |
| Throttle Body Mounting Flange | Rochester large 2-barrel |
| Venturi Quantity | 2 |
| Throttle Body Material | Cast aluminum |
| Throttle Body Color | Gold |
| 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. |
Compatibility
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