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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

SKU: SNE550-869K

Fuel Injection Systems

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

SKU: SNE550-869K

Fuel Injection Systems

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A$4,286.15
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

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

Part Type

Fuel Injection Systems

Data: v4.2 - Upd: 2026-10-23 00:24:15

Specifications

Product Attributes - Brand
Holley Sniper
Product Attributes - Manufacturer's Part Number
550-869K
Product Attributes - Part Type
Fuel Injection Systems
Product Attributes - Product Line
Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection Systems
Product Attributes - UPC
090127059005
Product Attributes - Fuel Injection Style
Throttle body
Product Attributes - Fuel Injection System Type
Single 4-Barrel Throttle Body (Spread-Bore Flange)
Product Attributes - Maximum Horsepower with Gas
500
Product Attributes - Timing Control Compatible
Yes
Product Attributes - ECM Included
Yes
Product Attributes - Self Tuning
Yes
Product Attributes - User Tunable
Yes
Product Attributes - Fuel System Included
Inline pump kit
Product Attributes - Fuel Pump Flow Rating (lph)
255
Product Attributes - Ignition System Included
None
Product Attributes - Power Distribution Included
None
Product Attributes - User Interface Included
3.5 in. display
Product Attributes - EGR
No
Product Attributes - Transmission Controller Included
No
Product Attributes - Metering Style
Speed density
Product Attributes - Multi-Port Fuel Rails Included
No
Product Attributes - Throttle Body Included
Yes
Product Attributes - Throttle Body Mounting Flange
4-barrel spread bore
Product Attributes - Venturi Quantity
4
Product Attributes - Venturi Diameter (mm)
34.93/51.00mm
Product Attributes - Airflow Rate (cfm)
715 cfm
Product Attributes - Throttle Body Material
Cast aluminum
Product Attributes - Throttle Body Color
Gold
Product Attributes - Injectors Included
Yes
Product Attributes - Injector Size (lbs/hr)
100 lbs./hr.
Product Attributes - Calibration Module Included
Yes
Product Attributes - Wiring Harness Included
Yes
Product Attributes - Oxygen Sensor Included
Yes
Product Attributes - Fuel Pressure Regulator Included
Yes
Product Attributes - MAP Sensor Included
Yes
Product Attributes - IAT Sensor Included
No
Product Attributes - TPS Sensor Included
Yes
Product Attributes - IAC Motor Included
Yes
Product Attributes - Quantity
Sold as a kit.
Product Attributes - 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.

Reference Information

Brand Name/s Holley Sniper
StreetFX SKU sne550-869K
SFX Item ID 5013640
Supplier Item Code 5013640
Manufacturer SKU 550-869K
Manufacturer UPC 90127059005
Alternative References SNI550-869K

Compatibility

Application Data
  • UniversalYes
    Fuel TypeGAS
    Cylinder Head TypeStock configuration

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