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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Reviewed in the United States on May 5, 2026
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I really like the Timex Ironman Shock watches. They are very durable and reliable. Simple to use and modeled after the. Original Ironman watches of the late 80s and 90s. Buttons are clearly marked and easy to press. They used to make many colors of this Shock model of the watch inc a cool shiny red color my wife still has . I have been a runner many many years and at 65, am still out although a lot slower than my 20s. But Timex Ironman watches have. Been my constant companion on the roads and track for 35 years now.
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Reviewed in the United States on March 27, 2026
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ricardo
Omaha, US
★★★★★ 5
Really nice
Color: Black/Green/Digital
Really nice watch but remind you it’s a negative display not a positive but since I have a small wrist it fits perfect. And I love it
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Reviewed in the United States on December 16, 2025
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Kent Martin
Draper, US
★★★★★ 1
Timex Watch Ironman is now junk.
Color: Black/Green/Digital
Timex Ironman watches are junk. They were once bullet proof but are just junk these days.
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Reviewed in the United States on April 7, 2026
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Amazon Customer
Houston, US
★★★★★ 5
Exactly what my husband was looking for
Color: Black/Green/Digital
Works well as expected
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Reviewed in the United States on January 4, 2026

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