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Ships within 48 hours · Estimated delivery Jul 5 - Jul 10
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Description
Holley Sniper EFI 550-869 Holley Sniper EFI QuadrajetOverview: 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:
- Available in 3 Finishes - Classic Gold, Shiny and Black Ceramic
- 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!
- 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
- Requires external fuel pressure regulator, such as: 12-886 or 12-879
- Certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance. Making Sniper EFI the perfect choice for carburetor to marine fuel injection conversions!
- A Flame Arrestor is REQUIRED for marine installations, such as part number, 720-1 or 720-13
- 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:
- 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
4.4 ★★★★★
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Product Reviews
★★★★★ 5
Nice printer
Style: WF-7820, Set: SINGLE TRAY (250 sheets/FAX/ADF/PRINT/COPY/SCAN
Printer work according to what I was expecting . Prints 🖨 great and fast / copy fast . Set up is easy but wifi and wireless connection is very tricky with phone set up . it may take some extra time . I look at videos on you tube for wifi & wireless set up . The APP there's a few App . I install the Epson smart App on my phone. Or the Epson iprint . The panel display will walk you through set up . also work great for me great display . I also like the lower tray went ready to print it comes out automatically and closes automatically went turning printer off .
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Reviewed in the United States on February 10, 2026
★★★★★ 5
So fun with good results!
Works great so far! Never used a sublimation printer or heat press before in my life and the shirt below is my attempt. The ghosting was totally user error and not due to the print. The set-up process was a bit long because it involved a 14 minute ink cycle, but the instructions walk you through every step very clearly so there were no issues. Follow them and you will be up and running in about 25 minutes. It did not come with paper as represented so be sure you have some on hand. The print quality is great from my perspective and from my shopping around, it's a great value for the money. There is little to no noise and it prints much faster than I was expecting.
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Reviewed in the United States on April 22, 2026
★★★★★ 5
Clear and Vibrant Printing
Absolutely LOVE this printer!! I was due for an upgrade and so happy I chose this one. Sublimation is so crisp and clear.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 10, 2026
★★★★★ 5
Highly recommended! 🎨✨
This Epson sublimation printer has been one of the best investments for my small business. The print quality is outstanding—colors come out vibrant, sharp, and consistent on every project. Whether I’m printing on mugs, shirts, tumblers, or keychains, the results are professional every single time.
Setup was easy, and the ink conversion for sublimation works smoothly. The printer runs quietly, and the prints dry quickly, which helps a lot when working on multiple orders. I also appreciate how efficient it is with ink; it lasts longer than I expected.
If you’re starting a sublimation business or simply love crafting, this printer is a game changer. Reliable, easy to use, and delivers perfect prints every time. Highly recommended! 🎨✨
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Reviewed in the United States on November 13, 2025
★★★★★ 5
Good quality works properly
Recommended, it is easy to use, it works very well and is of good quality
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Reviewed in the United States on March 28, 2026
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