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Description
Holley Sniper 550-858K Master EFI 1971-86 Jeep CJ 258 6 cylinder Fuel InjectionOverview: Introducing the Sniper EFI BBD Master Kit, for Jeep CJ's! The Sniper EFI BBD will be right at home on any 258ci powered trail rig, or weekend cruiser. Not only does the Sniper EFI BBD offer superior throttle response and WOT power over the carburetor, but you can also gain timing control! Put an end to cold start issues, hesitations, vapor lock, and flooding. Upgrade to Sniper EFI and get the tactical accuracy of EFI today! This master kit
Overview:
Introducing the Sniper EFI BBD Master Kit, for Jeep CJ's! The Sniper EFI BBD will be right at home on any 258ci powered trail rig, or weekend cruiser. Not only does the Sniper EFI BBD offer superior throttle response and WOT power over the carburetor, but you can also gain timing control! Put an end to cold start issues, hesitations, vapor lock, and flooding. Upgrade to Sniper EFI and get the tactical accuracy of EFI today! This master kit includes 20" of fuel hose, two filters, one high pressure EFI fuel pump, and all of the required fittings for a complete EFI fuel system conversion!
Features:
- Bolt on BBD Carburetor Replacement
- Engineered specifically for 1971-1986 Jeep CJ's with 258ci 6 Cylinder Engines
- Throttle body mounted ECU - no extra boxes to mount
- Supports up to 350HP with Two 100lb/hr Injectors
- Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
- Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
- Includes complete fuel system consisting of; 20ft of 3/8" Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!
- 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 TPS/IAC and Fuel Pressure regulator, for years of dependable service.
- Included clamp-on oxygen sensor kit for 2.25" exhaust ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1979 - 1986 | Jeep | CJ7 | 258/4.2L L6 | |
| 1981 - 1985 | Jeep | Scrambler | 258/4.2L L6 | |
| 1979 - 1983 | Jeep | CJ5 | 258/4.2L L6 |
Specs:
| Brand | Holley Sniper EFI |
|---|---|
| Emission Code | 3 |
| Finish | Shiny |
| Fuel Pressure | 58.5 PSI |
| Injector Size | 100 lb/hr @ 58.5 PSI |
| Inlet / Outlet Size | 9/16-18 Female O-Ring (AN 6) |
| Product Type | BBD EFI |
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
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Product Reviews
★★★★★ 4
Great general purpose, inexpensive mouse.
Color: Grey
For the price, it’s an outstanding mouse. Have only used Bluetooth mode, and only used it for basic computer operations (not gaming), but feels responsive and comfortable. Great battery life.
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Reviewed in the United States on January 27, 2026
★★★★★ 5
A great mouse for the price.
Color: Grey
This mouse is a great value and works well! It was extremely easy to connect to Bluetooth on my Microsoft Surface. I have also used it connected via the included dongle to my home PC.
The USB type C charge port is really appreciated to minimize the number of cables that need to be carried to charge everything. It lasts a great amount of time between charges.
My only minor complaint is that my large hands have a bit of difficulty holding it. I understand that it is a portable mouse intended to take on the go, so I didn't knock of anything for that.
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Reviewed in the United States on April 21, 2026
★★★★★ 5
THE BEST MOUSE ON THE MARKET!
Color: Grey
absolutely amazing mouse considering all factors! it is set at a good price range, and gets you a lot of features. it’s very durable, the frame is solid, it is compatible with MANY computers, a nice sleek black matte color. furthermore there is no delay, keeps my hand upright and the material keeps your hand comfy. thanks!
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Great mouse and best customer service ever!
Color: White
I bought this mouse a few months ago, and initially, I was quite happy with it. The design felt comfortable, and it worked smoothly right out of the box.
However, after a few months of use, I started facing an issue with the clicks. Sometimes a click wouldn’t register at all, and other times it would register as a double-click, which became pretty frustrating during regular use.
I decided to reach out to the company via email, and that’s where the experience really turned around. Their response was quick, the communication was crystal clear, and the whole process was smooth and hassle-free. Without much back-and-forth, they immediately sent me a replacement mouse.
I’ve been using the new mouse since then, and it has been working flawlessly with no issues at all.
Overall, while I did face a problem initially, the excellent customer support and the performance of the replacement have left me very satisfied. Highly recommend this mouse!
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Convenient Credit Card
This is an effortless and convenient way to purchase Amazon products. Unfortunately I am on it almost daily so the cash back feature is a plus.
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Reviewed in the United States on June 10, 2026