Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection Systems 550-869K Systems, EFI, Quadrajet, Throttle Body, Gold, Spread Bore Flange, Injectors, Pump, 255 lph, Regulator, Harness, Tuner, Kit
Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection Systems 550-869K Systems, EFI, Quadrajet, Throttle Body, Gold, Spread Bore Flange, Injectors, Pump, 255 lph, Regulator, Harness, Tuner, Kit
A$4,274.34
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Description
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 02:43:24
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 | sne550-869K |
| SFX Item ID | 5013640 |
| Accounting SKU | sne-550-869K |
| Manufacturer SKU | 550-869K |
| Manufacturer UPC | 090127059005 |
| Alternative References | 550-869K, SNE-550-869K, SNI550-869K |
Fuel Injection Systems, Sniper EFI, Quadrajet, Throttle Body, Gold, Spread Bore Flange, Injectors, Fuel Pump, 255 lph, Regulator, Harness, Tuner, Kit
Holley Sniper EFI Quadrajet self-tuning fuel injection systems are ideal replacements when you're tired of rebuilding the 50-plus-year-old Rochester Quadrajet (Q-jet) on your classic ride. They're the first bolt-on, spread-bore, EFI throttle-body systems not requiring any additional adapters, sealing plates, or intake manifold swaps. They retain the same great features as the 4150 Sniper EFI version (four 100 lbs.-hr. injectors; built-in timing control; high resolution 3.5 in. full color touchscreen; etc.). Their throttle body will support naturally aspirated power up to 500 hp. In addition, they offer multiple fuel inlet configurations that allow for a stock-appearing installation and fit most stock air cleaners. Modernize your Q-jet-powered classic vehicle with a Holley Sniper EFI Quadrajet self-tuning fuel injection system. They are offered individually or in Master kits with external fuel pressure regulator preset to 58.5 psi, 20 ft. of 3/8 in. Vapor Guard fuel hose, fuel pump, filters, necessary hardware, and bulkhead fitting to return fuel into the tank.
Features, items, and specs:
• Designed to deliver the signature "Rochester Roar" at wide-open throttle!
• Throttle body-mounted ECU–no extra boxes to mount
• Only 4 wiring connections required (battery positive and negative, switched ignition, and rpm)
• Transmission provisions on throttle lever for TH350/TH400 and 200R4/700R4
• Universal throttle and transmission kick-down bracket
• Brake booster adapter (if required)
• 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)
• Internal fuel pressure regulator preset to 58.5 psi
• 20 ft. of 3/8 in. Vapor Guard fuel hose
• Fuel pump and filters
• Necessary hardware and bulkhead fitting to return fuel to the tank
• Genuine Bosch LSU 4.9 wide-band oxygen sensor provides real-time fuel map learning
• OEM-style throttle position sensor (TPS) and idle air control (IAC) for years of dependable service
• Clamp-on oxygen sensor kit ensures leak-free oxygen sensor installation with stainless steel T-bolt clamps and weld-ready oxygen sensor flange
• United States Coast Guard approved (certified to ISO 8846, SAE J1171 requirements)
• Available in three finishes--Classic Gold, Shiny, and Black Ceramic
| Product Attributes | |
|---|---|
| Brand | Holley Sniper |
| Manufacturer's Part Number | 550-869K |
| Part Type | Fuel Injection Systems |
| Product Line | Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection Systems |
| UPC | 090127059005 |
| Fuel Injection Style | Throttle body |
| Fuel Injection System Type | Single 4-Barrel Throttle Body (Spread-Bore Flange) |
| Maximum Horsepower with Gas | 500 |
| Timing Control Compatible | Yes |
| ECM Included | Yes |
| Self Tuning | Yes |
| User Tunable | Yes |
| Fuel System Included | Inline pump kit |
| Fuel Pump Flow Rating (lph) | 255 |
| Ignition System Included | None |
| Power Distribution Included | None |
| User Interface Included | 3.5 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 spread bore |
| Venturi Quantity | 4 |
| Venturi Diameter (mm) | 34.93/51.00mm |
| Airflow Rate (cfm) | 715 cfm |
| 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 | No |
| TPS Sensor Included | Yes |
| IAC Motor Included | Yes |
| Quantity | Sold as a kit. |
| Notes | This kit will work on any vehicle equipped with a 4-barrel Quadrajet style flange intake manifold. Kit features provisions on throttle lever for TH350, TH400, 200R4, or 700R4 transmissions and universal throttle and kickdown bracket. |
Compatibility
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