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Holley 550-516 Sniper EFI Master Kit with Classic Finish
510-550-516K
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Sniper EFI Master Kit Sniper Self-Tuning "Classic" Bronze Throttle Body 3.5" Touch Screen Fuel System Kit
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EFI Self-Tuning Kits
Holley 550-516K Sniper EFI Master Kit with Classic Finish Features:
- Dual Pattern bolt-on carburetor replacement, made to fit 4150 Flange & Spread Bore manifolds
- Simple Calibration Wizard - Answer a few questions about your engine, and it creates the base map, then starts tuning on its own with no laptop needed
- Self-tuning ECU for easy EFI without requiring advanced computer/tuning skills
- Only 4 Wiring Connections Required - Battery +, Battery -, Switched Ignition & RPM
- High-Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
- Supports up to 650hp with Four 100 Lb/Hr Injectors!
- Throttle body mounted ECU – no extra boxes to mount
- 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!
- Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
- Integrated ignition timing control & coil driver
- The included Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
- OEM Style TPS/IAC and Fuel Pressure regulator, 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
Note: If using a Holley Dual Sync distributor, adapter harness p/n 510-558-493 is required to connect to the Sniper EFI.
- For Troubleshooting Tips setting up your New Holley Sniper EFI System, please see this helpful video from Holley Performance.
Specifications:
Part Type
Product Line
Package Depth
9.80
Package Height
26.30
Package Width
15.00
Part Category
Performance Parts
Part Fitment
Semi Universal
Shipping Weight
20.60
Vendor Part Number
550-516K
550-516K is rated
out of
5 by
15.
Rated 5 out of
5
by
CJohn from
So far so good !!
I can't really give a fair rating to my sniper efi yet. It is still being installed in my 74 CJ5. I can say that my mechanic praised the quality of the kit components very highly, and after showing them to me, I have to say I'm very impressed. Being from Holley, I have no doubt that the sniper system will be great - miles better than my previous horrible FiTech system.
Date published: 2021-06-08
Rated 5 out of
5
by
ps James from
Easy to install
I installed this on my 32 ford with a 351w engine set up was easy once i increased idle speed so it would start and run did not like the fuel pump noise or whine so I installed a in tank pump based on recommendations from Holley tech works great fast throttle response
Date published: 2021-04-26
Rated 5 out of
5
by
MP85K10 from
Cranked immediately first turn
Took me some time to install on my own. I took my time planning out where to run fuel lines and wires. I’m a novice mechanic and I took my time making sure everything was done correctly the first time. It took me probably 12 hours start to finish over a couple of days. Once it was all hooked up. I primed the fuel system for a few minutes, closed my eyes, and turned it over... cranked faster than it had ever had with the 25 year old 4160 Holley carb! the throttle response is amazing. For my application 1985 Chevy K10 with cruise control, I needed a throttle bracket extension to give the throttle cable more leverage on the bracket. It was very touchy and tough to ease the throttle open from 0. Haven’t installed the extension yet but the reviews Ive read say it will fix my problem.
Date published: 2020-12-14
Rated 5 out of
5
by
69F100gary from
Nice upgrade
1969 Ford F100, 351W, C6 automatic. I followed the QUICKSTART MANUAL SNIPER EFI INSTALLATION INSTRUCTIONS. I have a Ready to Run distributer, so I did not use the sniper timing option. I used the radiator fan option. Installed the fuel pump, coolent sensor, and O2 sensor. I found a holder for the display, and mounted it to the dash. Much to my surprise, I started it up, and it ran great!
Date published: 2020-05-14
Rated 5 out of
5
by
Brainfdead from
The best money I have spent on my 55 chevy
This is by far one of the best investments I've made to improve the reliability of my car. Easy to install.
Date published: 2019-06-30
Rated 5 out of
5
by
madbad from
Say no to Carbs
Installed 3 weeks ago.So far so good,install was easy needs to come with 90 deg AN fittings instead of straight.If you have a 14" round air cleaner bottom will not fit ,Jegs sells the special one that will fit.Set up was a breeze, so far has been flawless.Hope the reliability is there! I will never use a carb again.
Date published: 2019-05-14
Rated 5 out of
5
by
drentz from
excellent upgrade
I've had this installed for almost a month now, maybe only put 60-70 miles on it so far, but I am absolutely satisfied with this purchase. And I must add, if you have any problems or questions or concerns, the customer support that you receive is awesome. The throttle response and no more cold start issues or dieseling is well worth it alone, then add the reliability of Holley's reputation.......A+++
Date published: 2019-05-07
Rated 5 out of
5
by
Sweet t from
Every thing you need in one box
Install and tuning are pretty easy with this setup
Date published: 2018-01-01
what type of warranty is given?
The Holley 510-550-516K EFI is warranted for 90 days from date of purchase.
Date published: 2024-02-21
I have an 350 vortec/700r4 what would be the best street intake manifold and brackets for 700r4 tv cable i seen on engine masters that the dual plane intake manifold caused fuel distribution problems so they went with a single plane and it worked great
We have these single plane intakes, but they are designed for high RPM. https://www.jegs.com/i/Edelbrock/350/2913/10002/-1
Date published: 2018-11-08
Is there an adaptor for the kick down linkage for big block mopar to use on a 727 automatic trans.
The standard bracket and linkage from most carburetors will work on this EFI throttle body. Or a cable kit like this https://www.jegs.com/i/Lokar/625/KD-2727HT/10002/-1
Date published: 2018-09-14
My 71 GMC PU has an in bed fuel tank with a top siphon tube running to the mechanical fuel pump/carb. Will this fuel pump draw from the top siphon tube with pump mounted flush to the tank bottom, I have the tank inside an aluminum tool box in bed. Thanks
This is can draw a limited amount of fuel depending on the pickup tube.
Date published: 2023-06-04
can you pump e85?
Yes you can, but you will need to change fuel values and be able to do laptop tuning.
Date published: 2020-08-09
Will this work with a nitrous oxide Cheater plate system with a 150 shot.
Yes a NOS Cheater Plate system made to fit Holley 4150/4160 flange carburetors will work with this.
Date published: 2024-03-22
I still have an (old) new-in-box Mallory Unilite for my SB (260) Ford. Will this be usable with the Sniper?
Yes, a Unilite distributor will work with the Sniper EFI system.
Date published: 2017-10-19
Will this kit work on an LS with holley dual plane carb intake manifold and MSD 6010 Box?
Yes, this unit will work on that application.
Date published: 2017-09-15
Emissions Notes:This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:1965 and older U.S. manufactured California ...
Big Block Chevy - Tall DeckKit Includes:(1) Holley Sniper EFI HyperSpark Distributor, Black Finish - 510-565-309BK(1) Holley Sniper EFI HyperSpark Ignition Box - 510-556-151(1) Holley Sniper EFI HyperSpark Ignition Coil - 510-556-152Emissions Notes:This part is only legal for sale and ...
Holley 565-312BKK Kit Includes:(1) Holley Sniper EFI HyperSpark Distributor [Black Finish] 510-565-312BK(1) Holley Sniper EFI HyperSpark Ignition Box 510-556-151(1) Holley Sniper EFI HyperSpark Ignition Coil 510-556-152Emissions Notes:This part is only legal for sale and use on Uncontrolled (Non-Emissions ...
Some parts are not legal for use in California or other states with similar laws / regulations
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.