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Holley 550-510 Sniper EFI Master Kit with Shiny Finish
510-550-510K
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Sniper EFI Master KitSniper Self-Tuning Shiny Throttle Body 3.50 in. Touch Screen Fuel System Kit
Items You Need
JEGS 15225 - Universal Dual Return Spring Kit Made in the USA
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JEGS 50022 - Air Cleaner with Logo 14 in. x 3 in. [Chrome-Plated]
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Holley 120-510 - 120-510 Sniper EFI Air Cleaner Drop Base
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Holley 120-511 - 120-511 Sniper EFI Air Cleaner Drop Base
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Holley 20-2 - Throttle Linkage Ball Studs Kit Contains The Following: 1/4", 5/16", 7/32" & 3/8" Studs
$19.61
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EFI Self-Tuning Kits
Holley 550-510K Sniper EFI Self-Tuning Master Kit with Shiny Finish Features:
- Dual Pattern bolt-on carburetor replacement, made to fit 4150 Flange & Spread Bore manifolds
- Self-tuning ECU for easy EFI without requiring advanced computer/tuning skills
- 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!)
- 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
- Integrated ignition timing control & coil driver
- 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
- Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI)
- Includes a 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!
- The included Genuine 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
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.
550-510K is rated
out of
5 by
18.
Rated 5 out of
5
by
Gpdp from
Ease of installation
Put this on my zz/4, i couldn’t believe the difference. Easy install with great instructions!
Date published: 2022-03-22
Rated 5 out of
5
by
MarCal from
Holley carb - injector replacement
Prompt delivery at a reasonable price.instructions were helpful and complete. I’m delighted with the performance of the Holley product!
Date published: 2021-02-17
Rated 5 out of
5
by
1940 coupe from
easy to install
this holley sniper efi was easy to install in my 1940 ford coupe it really woke up my 347 stroker!!!!!! get read of ur carb buy HOLLEY SNIPER!!!!
Date published: 2021-02-14
Rated 5 out of
5
by
Moneyman from
Finally!
I purchased this after going through 3 carboretors which never ran the way I wanted. I installed the Sniper, which was really easy. It took 2 days for the complete install. I started the car and within a half hour it was running better than I ever had. The "stumble" was gone! It came with everything I needed. You won't be sorry!
Date published: 2019-10-10
Rated 5 out of
5
by
67camarocomo from
Great addition
At the price point of these new systems, there's no reason not to switch to EFI these days. Driveability and throttle response has improved tenfold.
A slight 'slurping' sound similar to the rear barrels opening on a vacuum actuated carb that is more prevalent than on the carb but I kinda think it's a cool sound (let's you know that its sucking that ait and powering up) and frankly its a small price to pay. I suspect it's the air drawing through the smaller venturi opening. Maybe Holley fixes it going forward, maybe they don't. I'd be fine either way.
My worried about noise from the fuel pump were unfounded; can't hear a thing.
Great, great product. So THAT'S what a 383 is supposed to feel like? Here I thought 'cranky V8 that can't run cooler than 180 degrees' was the best I could do. Nope - this thing feels like a modern performance engine now.
Date published: 2017-06-30
Rated 5 out of
5
by
Bob92 from
Big performance increase to our 454!
We did not think it would make that much of a difference to our 454 but the power increase is amazing! Starts so much easier also. Installation was a little involved as we were putting this on a 68 impala and had to run a return gas line to the tank. Other than that installation wasn't too bad. Holley will provide great help you if you call them also.
Date published: 2017-05-29
Rated 5 out of
5
by
Alwood from
Sniper Install
I bought this unit and gas tank for my 67 Mustang. The car has a 428CI FE, 10.5-1 compression and has always been a bear to start when cold. It would just turn over, cough etc for several minutes. Just finished the install and the car fired right up away. Didn't even have to hit the gas pedal. After fighting with this for many years it was great to have it fire up right away. Wished I had done it earlier. But it is still winter here and have not had the chance to put some miles on it will have to wait until spring.
Date published: 2017-02-14
Rated 4 out of
5
by
jerryBinWi from
Very good kit, easy to install
I love the way my 80 Corvette runs now. Almost like a new car with this fuel injection. One thing they don't mention, you need to turn on the ignition and wait for the fuel pump to build pressure. It only takes about 2-3 seconds, kinda like waiting for glow plugs to heat up in diesel. The kit was complete for the most part. The EFI fuel kit (526-5/525\8), sent as part of the whole kit had only three hose nipples (called ST to 3/8 vapor guard hose end) 4 were required. Fortunately, I had some of my own fittings so I was able to substitute.
Date published: 2021-09-21
Could I use this to replace a 1995 5.7L Chevy 2 barrel TBI with a obd1 computer? Of course I would have to replace the intake manifold
The Holley 510-550-510K EFI kit does not work with any factory electronics.
Date published: 2024-01-16
Will it learn with aftermarket camshafts
The Holley 510-550-510K EFI kit will learn aftermarket camshafts.
Date published: 2023-12-13
Do these work with a mechanical fuel pump or does it need an electric pump? If it needs an electric one, does that come in the kit or is there a specific one that’s recommended?
The Holley 510-550-510K tbi kit does not work with a mechanical fuel pump.
Date published: 2023-03-20
Just to make sure this will plug into my MSD distribution and MSD box?
Yes.Compatible with MSD
Date published: 2018-11-02
Do they make a Sniper efi kit for a sbc tunnel ram?
You can use 2 of thee throttle bodies on the tunnel ram to make it work.
Date published: 2018-09-17
Will this fit a Ford 312 engine?
These kits are made to fit almost any engine. As long as you have a 4150 carb flange this EFI unit can be configured to work for you.
Date published: 2018-11-19
What is the filter neck height and can this system be used with capacitive discharge ignition
It is a standard carburetor size 5 1/8". this can be used with a CD ignition.
Date published: 2023-04-20
Parts needed to in a sniper efi on a stock 1977 ford f250 with a 460 automatic transmission.
This should work on your truck, you may need to re-use some of the linkage components from you carburetor for the transmission.
Date published: 2021-01-15
Breakdown of Included ItemsDimensionsFeatures:Includes a throttle body adapter for better intake tube routing in swap applicationsComes with a GM Type II power steering pump and power steering hard line adaptersThe alternator is relocated closer to the block for more clearance ...
Sniper EFI Installation Kits are great when replacing a carburetor and some of the small parts come up missing. Install kits will include electrical and mechanical parts that are needed and can cause a headache when trying to complete and install ...
For Troubleshooting Tips setting up your New Holley Sniper EFI System, please see this helpful video from Holley Performance.Sniper EFI Self-Tuning HyperSpark Kit Includes:Holley Sniper EFI Master Kit - 510-550-516DHolley Sniper EFI HyperSpark Distributor - 510-565-300Holley Sniper EFI HyperSpark ...
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.