SKU: 32354909334

Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection System 500hp # HO550-867

Sale price$1192.50 Regular price$1325.00
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Description

Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection System 500hp # HO550-867Holley Sniper EFI Quadrajet Self Tuning Fuel Injection System 500hp # HO550 867 Fuel Injection Systems, Sniper EFI, Quadrajet, Throttle Body, Polished, Spread Bore Flange, Injectors, Pressure Regulator, Harness, Tuner, Kit 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 Power Adder Compatible: No ECM Included: Yes Self

Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection System 500hp # HO550-867
Fuel Injection Systems, Sniper EFI, Quadrajet, Throttle Body, Polished, Spread Bore Flange, Injectors, Pressure Regulator, Harness, Tuner, Kit
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
Power Adder Compatible:
No
ECM Included:
Yes
Self Tuning:
Yes
User Tunable:
Yes
Fuel Pump Included:
No
EGR:
No
Transmission Controller Included:
No
Metering Style:
Speed density
Intake Manifold Included:
No
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 Finish:
Tumble 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:
No
Distributor Included:
No
MAP Sensor Included:
Yes
IAT Sensor Included:
Yes
TPS Sensor Included:
Yes
IAC Motor Included:
Yes
Quantity:
Sold as a kit.
Holley Sniper EFI Quadrajet Self-Tuning Fuel Injection Systems
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 ECUno 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 ownno 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
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 32354909334

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★★★★★ 3
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Reviewed in the United States on June 5, 2025
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Alfonso A
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★★★★★ 5
Very elegant
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Very elegant ! Good quality
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Reviewed in the United States on January 19, 2026
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TV
Birmingham, US
★★★★★ 4
Utilitarian-Simple and sleek
Size: One Size, Color: Tan
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Reviewed in the United States on February 13, 2025
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Darlene Butler
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★★★★★ 1
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Reviewed in the United States on September 1, 2024
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Blueberry Hill
Waukegan, US
★★★★★ 1
Awful fabric
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Reviewed in the United States on June 21, 2021

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