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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
4.5 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
OBSESSED - My New Go-To SPF ✨
Color: Glow
I don’t say this lightly - I’m OBSESSED. The Colorescience Glow SPF is hands down the best sunscreen I’ve ever used.
This formula makes my skin look unreal - plumped, radiant, and healthy from morning to night. It gives that lit-from-within glow without ever looking greasy or heavy.
I’m super sensitive to sunscreens (most of them irritate my skin and eyes), but this one is perfection. No reactions, no discomfort- just smooth, glowing skin all day.
I also ordered the Flex and can’t wait to try it next.
This is officially my forever SPF
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Reviewed in the United States on April 18, 2026
★★★★★ 5
Best Sunblock ever!!
Color: Bronze
I kept seeing this all over my social media, so I decided to do some research before purchasing. I was pleased at how high the reviews were. I decided to purchase and I’m totally obsessed! I’ve been using for a few months now and I don’t even wear any foundation anymore. This has literally replaced it. I love how it glides on like butter, and how It’s so smooth and light. I get so many compliments on my face. Best sunblock ever!! I’m forever a customer! Highly recommended!!
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Bronze and Matte are brown girl friendly
Color: Bronze, Color: Bronze
TLDR:
I got bronze and matte formulas and I have oily skin. I’m very happy with these. Bronze is a perfect match until it oxidizes so I mix it with medium for the perfect shade. Bronze will be flexible across a wide range of skin tones. Matte formula is perfect on its own, more like a satin matte finish. I think matte has less pigment than bronze. Both are easy to apply and reapply, blends nicely, zero white cast- no Casper.
What I liked:
I really like the finish on these. I have oily skin and these work well for me. They don’t burn my eyes. Bronze gives a little glow while matte tones down the shine but it’s not too matte, more like satin matte. I can wear matte on its own but I have to mix bronze with medium because it oxidizes after a few minutes.
These are both great options for daily wear.
What could be better:
I wouldn’t change anything about the matte formula. But it can get thick after several reapplications. I wish the bronze formula didn’t oxidize. While it doesn’t oxidize every time, you just never know when it will. But mixing it with medium helps to keep it chill.
Skin tone:
For reference, I usually have to mix shades to get my perfect match. But my skin tone tans very easily and is lighter in winter, darker in summer. So I mix medium with bronze or tan. Some of my foundation colors if it helps you: Armani 7.8, Hourglass 11, EL DW 4N2, MUFE 3N42, NARS Aruba, Dior 4N, Haus Labs 330.
Would I recommend:
Yes! This is best for brown girls who want a tinted sunscreen without a white cast. And it’s even for lighter people who want to bronze up their skin.
About my photos/video:
Photos show me wearing each formula as well as swatches.
Hope this helps!
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Reviewed in the United States on July 14, 2025
★★★★★ 5
Definitely Recommend
Color: Glow, Color: Glow
I love the GLOW of this product and that you get some SPF protection. I have used it for years and put on with a serum to even it out and a blending sponge. I would definitely recommend and have bought it as a gift for my sisters
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Reviewed in the United States on April 28, 2026
★★★★★ 4
Perfection! Not for very pale skin, unless it’s contour..
Color: Bronze, Color: Bronze
I only deducted a star because it was not perfect for “all skin tones”. I am very pale with cool pink undertone. Where it does give me “healthy color” without being orange (after waiting 15-20 minutes for the color to settle.), which is something I have never had before with a bronzer. I’m impressed. But… as you can see I the photo, you can clearly see where the spf ends and my shoulders begin. I prefer something more subtle so if I decide to take change my top or if my strap moves you don’t see the stark alabaster skin line. That said, if I was going to be fastidious about where my close rest on me, this would be wonderful.
Ok now the pros:
Goes on like a dream. Unscented, but the smell of the ingredients is subtle (maybe some Shea butter scent? It’s so light I can’t place it) and goes away after about 20 minutes. I have very dry, extremely sensitive skin. I mean… VERY sensitive. This feels like a high end thicker moisturizing cream/balm, but had zero stickiness or oily feeling. When I first saw the deep brown bronze color in the drops j put on my fingertips and then the orangy tint as I first put it on I started to panic. Thankfully it blended in quite well. I have NEVER had a bronzer look natural or not orange on me. So the product base is exquisite. I have bought over 27 face sunscreen products this year trying to find anything my skin would play nice with and my skin actually LOVES this. I further I have it on and I hugged my nesting partner who was wearing a light t-shirt and there was no transfer or oily blotches on his shirt as I have had with most others. I used the original version of this that has a neutral beige tint, the formulas feel identical, though I have not checked the ingredients. What is important here is it layers beautifully! I had the bronze on and because 2 hours had gone by I put the original over it and wow, I love the effect! I still can’t feel it on and it hasn’t pilled or left creases of product on my neck (unlike Elta MD Clear’s 2nd and 3rd 2hour reapplication layers.)
Here is what I am squealing with excitement about. Not only does my skin adore this product feel and formulation, but it layers! I am going to try to contour myself with the bronze. Use the Original first, and add contours under my jaw, where blush would go and my temples, blending before the product dries. Because of the way the bronze didn’t shift when I applied the original on top, it is likely that when I apply the other layers of just the original every 2 hours, it should still look beautiful.
I WILL be experimenting with how this works and how well it holds up to being outside, then update you here. (Currently I am outside less than an hour, but have enough windows o still get sun burned and sun angry red skin within 2 hours inside my home. So I still want to check for outside direct sunlight efficacy too.)
(Before this I was using SuperGoop Unseen Sunscreen, but my face still got red/irritated and EltaMD UV Clear, which had less redness/irritation, but was still causing me mild redness. Everything else was either tacky, oily or had an unacceptably white cast. The closest to 3rd runner up was the “No more foundation” it’s cosmetics moisturizing spf cream. It moisturized with zero skin irritation and had fantastic spf, but I did look like I had a plastic mask which is jot my thing. It appears I have the best of what I adored about “No more foundation” and a clear or unnoticeable tinted spf that looks plausibly natural!)
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Reviewed in the United States on May 3, 2021