SKU: 35354283640

Holley EFI 550-869K Sniper EFI Quadrajet Master Kit

Sale price$944.97 Regular price$1049.97
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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Holley EFI 550-869K Sniper EFI Quadrajet Master KitOverview: Are you tired of rebuilding the 50+ year old Rochester Quadrajet (Q Jet) on your classic Chevrolet, GMC, Buick, Oldsmobile, or Pontiac? Introducing Sniper EFI Quadrajet. The first bolt on spread bore electronic fuel injected throttle body system that does not require any additional adapters, sealing plates, or intake manifold swaps! The Sniper EFI Rochester Quadrajet (Q Jet) system retains the same great features as the 4150 Sniper EFI

Overview:

Are you tired of rebuilding the 50+ year old Rochester Quadrajet™ (Q-Jet) on your classic Chevrolet, GMC, Buick, Oldsmobile, or Pontiac? Introducing Sniper EFI Quadrajet™. The first bolt on spread bore electronic fuel injected throttle body system that does not require any additional adapters, sealing plates, or intake manifold swaps! The Sniper EFI Rochester Quadrajet™ (Q-Jet) system retains the same great features as the 4150 Sniper EFI version such as; four 100lb/hr Injectors, built in timing control, a 3.5" full color touchscreen and much more! The throttle body will support up to 500 horsepower naturally aspirated. In addition to all of these great tried and true features, the Sniper EFI Rochester Quadrajet™ (Q-Jet) system will fit most stock air cleaners and offers multiple fuel inlet configurations that allow for a stock appearing installation!

Features:

  • Designed to deliver the signature Rochester Roar at Wide Open Throttle!
  • Throttle body mounted ECU - no extra boxes to mount
  • Supports up to 500hp with Four 100 Lb/Hr Injectors!
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • Integrated ignition timing control
  • Transmission provisions on throttle lever for TH350/TH400 and 200R4/700R4
  • Fits most stock Rochester Quadrajet (Q-Jet) air cleaners
  • Brake Booster adapter included, if required
  • Universal Throttle and transmission kickdown bracket included
  • High Resolution Full Color Touchscreen 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!
  • Complete fuel system includes - external fuel pressure regulator preset to 58.5psi, 20ft of 3/8" Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!
  • 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 realtime Fuel Map Learn!
  • OEM Style Throttle Position Senser (TPS)/ and Idle Air Control (IAC) for years of dependable service.
  • Included clamp-on oxygen sensor kit ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
  • Patent Pending

 

Application:

Year Make Model Submodel Engine Size
Universal

 

Specs:

Brand Holley Sniper EFI
CFM 715
Coast Guard Approved Yes
Emission Code 3
Finish Classic Gold
Flange Style Spreadbore
Fuel Pressure 58.5 PSI
Height 3.28"
Injector Size 100 lb/hr @ 58.5 PSI
Inlet / Outlet Size 9/16-18 Female O-Ring (AN 6)
MAP Sensor 2Bar
Max Horsepower Rating 500 Naturally Aspirated
Product Type Sniper 4BBL TBI Kits
Throttle Bore 1.375 Primary / 2.00 Secondary
Transmission 700R4/200R4
Warning California Proposition 65
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: 35354283640

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Matthew C Garza
Lake Worth, US
★★★★★ 5
Great piece!
Color: Veiled Maiden
If you're looking for a cost effective way to get this bust, this is a great option. The molding looks good and clean on all surfaces and edges. Very white in color. I really think they did a great job.
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Reviewed in the United States on February 13, 2024
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Tiffany
Waukegan, US
★★★★★ 5
Beautifully made bust with great detail and solid quality
Color: Veiled Maiden, Color: Veiled Maiden
This is a really beautiful bust. The casting is well done, the details are clean and sharp, and the overall nice weight and the quality feels solid and well-made. The size is exactly what I expected and it has a great presence once it’s displayed. It looks elegant and adds a nice artistic touch to the space. I’m very happy with how it turned out and would absolutely recommend it if you’re looking for a decorative statement piece.
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Reviewed in the United States on January 9, 2026
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Mike Kelly
Chelsea, US
★★★★★ 5
Very nice!
Color: Veiled Maiden
Cool product. Exceeded expectations.
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Reviewed in the United States on February 21, 2026
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K
Omaha, US
★★★★★ 5
Lovely decor piece!
Color: 12"venus
This just what I wanted. It is nicely made. Thank you!
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Reviewed in the United States on September 13, 2025
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Charlotte Watkins
Grantham, US
★★★★★ 5
Nice Addition
Color: Veiled Maiden, Color: Veiled Maiden
Very nice size I spray painted to get the color I wanted came out beautiful. It’s a light weight. It dropped and cracked open but I will use super glue to hold it together. Still looks nice just weathered. It could’ve cost less.
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Reviewed in the United States on May 24, 2026

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