Holley Sniper 550-516K EFI 4150 4-Barrel Self-Tuning Master Kit

Description

It is a direct carburetor replacement that will fit single and dual plane intake manifolds, This throttle body fuel injection replaces any square bore or spread bore style 4-barrel carburetor, A built in ECU keeps the wiring neat and tidy with no need to run the computer and associated wiring back into the cab of the vehicle, The self-learning ECU takes care of setting the baseline tune while the full touchscreen display allows you to fine tune as you please, Designed to be a self-tuning, plug and play fuel injection system that takes all the trouble and guesswork out of your switch to modern electronic fuel injection
Holley Sniper 550-516K EFI 4150 4-Barrel Self-Tuning Master Kit
Sku # 425550516K
Mfr. Part # 550-516K
Condition
New
Brand
Holley Sniper
Sold
Each
Details
Info
Put an end to mysterious air/fuel ratios, jet changes, and cold-start rough idle troubles with Holley Sniper EFI. Affordable aftermarket fuel injection is here and it couldn't be any easier to install on your vehicle. Holley Sniper EFI is a perfect match for any muscle car, classic truck, street rod, or nearly any other carbureted vehicle. Economically priced to save your hard earned money for other parts of your build; Holley Sniper EFI is a self-tuning, plug and play fuel injection system that takes all the trouble and guesswork out of your switch to modern electronic fuel injection. With over 100 years of building quality fuel systems, you can trust Holley Sniper with all your electronic fuel injection needs!
Holley Sniper EFI is packed with all the features that your car or truck needs. This throttle body fuel injection replaces any square bore or spread bore style 4-barrel carburetor. The built in ECU keeps the wiring neat and tidy with no need to run the computer and associated wiring back into the cab of the vehicle. Connect the 4 necessary wires and you're good to go. The self-learning ECU takes care of setting the baseline tune while the full touchscreen display allows you to fine tune as you please. Sniper EFI throttle bodies utilize OEM style TPS and IAC modules for dependable and serviceable use. Life is too short to hassle with cold start issues, hesitations, flooding, and carburetor inconsistencies. Leave that old 4-barrel to rest and bring in a new era of performance, reliability, and fun with a Holley Sniper EFI system!
Holley Sniper EFI Master Kits include everything you will need to get your new Sniper EFI throttle body setup and running on any of your vehicles. Master Kits include 20 feet of 3/8" EFI fuel hose, in-line electric fuel pump, pre and post filters, return bulkhead, and all of the needed fuel fittings and hardware to get your system plumbed, wired up and running in no time.
Direct carburetor replacement
Fits single and dual plane intake manifolds
Naturally aspirated applications only
Throttle body mounted ECU - no extra computers to mount or relocate
Capable of supporting up to 650 HP
Simple, 4 wire connection (Battery +, Battery -, Switched ignition & RPM)
Built in pre-set fuel pressure regulator
Integrated ignition timing control & coil driver
Color touchscreen for easy setup and gauge displays
Self tuning ECU means you dont have to be a computer/tuning expert to enjoy EFI
Gold finish
Sold individually
Charts
(PDF)
(PDF)
(PDF)
Specs
Sold in Quantity
Kit
Carburetor Flange Type
4-Barrel Dominator
Injection Style
Throttle Body
Metering Style
Speed density
Intake Manifold Included
No
Throttle Body Included
Yes
Distributor Included
No
Wiring Harness Included
Yes
EGR
No
Fuel Pump Included
Yes
Injectors Included
Yes
Fuel Rails Included
No
Calibration Module Included
Yes
TPS Sensor Included
Yes
IAC Motor Included
Yes
ECM Included
Yes
Fuel Pressure Regulator Included
Yes
MAP Sensor Included
Yes
IAT Sensor Included
No
Venturi Quantity
4
Self Tuning
Yes
MFG. Part #
550-516K
Throttle Body Barrels
4-Barrel
Throttle Body Material
Aluminum
User Tunable
Yes
Injector Size
100 lbs./hr.
Throttle Body Finish
Gold
Use with Power Adder
Yes
GTIN Code
090127045268
CFM
1440 CFM
Venturi Diameter
54.00mm
Max Horsepower Rating
1500
Reviews
I would buy again but hopefully wont have to
Rated
by JD on April 02, 2021
Summary:
Works like promised. You'll probably need a new throttle bracket and cable though. I used lokar.
Pros:
Easy install
Yes, I recommend this product.
Sniper worked awsome . Shipping was right on time. Verry ha
Rated
by Kevin on March 04, 2021
Summary:
After tuneing car runs great.
Yes, I recommend this product.
I would buy again
Rated
by Matt on March 11, 2019
Summary:
Seems like a very high quality part all the wires are labeled still installing at this time
Yes, I recommend this product.
Holley sniper
Rated
by Tuggy on April 05, 2018
Summary:
Looks like a very well designed system ordered the master kit. Have yet to install but this should be the be all end all Still working on break Engine in. Once it's broke in I'll be installing the efi.
Yes, I recommend this product.
Related Items / Suggested Parts
Holley Sniper 550-510K EFI 4150 4-Barrel Self-Tuning Master Kit
Holley Sniper 550-511K EFI 4150 4-Barrel Self-Tuning Master Kit
Holley 12-878 EFI Replacement Regulator Kit
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Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 69 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
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