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Part # 425550511K

Holley Sniper 550-511K EFI 4150 4-Barrel Self-Tuning Master Kit

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  • Features a throttle body mounted ECU
  • It is capable of supporting up to 650 HP
  • Will fit single and dual plane intake manifolds

$1,475.95

each

In Stock


Quantity

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Product Summary

Universal Fit, Throttle Body Injection Style, Black

  • Features a throttle body mounted ECU
  • It is capable of supporting up to 650 HP
  • Will fit single and dual plane intake manifolds
  • Has an integrated ignition timing control
  • Comes with a color touchscreen for easy setup and gauge displays

Key Specs

MFG. Part #550-511K
Carburetor Flange Type4-Barrel Square Bore
Injection StyleThrottle Body
User TunableYes
Self TuningYes

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Details

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
  • Black finish
  • Sold individually

Charts

Specifications

KEY SPECS
MFG. Part #550-511K
BrandHolley Sniper
Carburetor Flange Type4-Barrel Square Bore
Injection StyleThrottle Body
User TunableYes
Self TuningYes
GENERAL
Injectors IncludedYes
Injector Size100 lbs./hr.
Intake Manifold IncludedNo
Metering StyleSpeed density
EGRNo
CFM800 CFM
Throttle Body IncludedYes
Throttle Body MaterialCast Aluminum
Throttle Body FinishBlack
Venturi Quantity4
Fuel Pump IncludedYes
Fuel Rails IncludedYes
Calibration Module IncludedYes
ECM IncludedYes
Wiring Harness IncludedYes
Fuel Pressure Regulator IncludedYes
Distributor IncludedNo
MAP Sensor IncludedYes
IAC Motor IncludedYes
IAT Sensor IncludedYes
TPS Sensor IncludedYes
Emission Code3
Throttle Bore1.6875 (1 11/16ths)
Use with Power AdderNo
Venturi Diameter44.45mm
Max Horsepower Rating650
ColorBlack
Throttle Body Barrels4-Barrel
GTIN Code090127001493
Sold in QuantityKit