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Product Summary

Chevy Small Block V8, Chevy Big Block V8, User Tunable

  • Breathe new life into your Small Block Chevy or Big Block Chevy engine with this easy-to-install fuel injection/distributor ignition kit
  • Throttle body mounted ECU - no extra computers to mount or relocate
  • Self tuning ECU means you dont have to be a computer/tuning expert to enjoy EFI
  • Capable of supporting up to 650 HP
  • Precision machined shutter wheel designed for improved accuracy at extreme engine RPM

Comes as a Kit

Key Specs

BrandHolley Sniper

Need To Know

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Details

Breathe new life into your Small Block Chevy or Big Block Chevy engine with this easy-to-install fuel injection/distributor ignition kit!

Kit Includes:

  • (1) Holley Sniper 550-511 EFI 4150 4-Barrel Self-Tuning Base Kit
  • (1) Holley 565-200 EFI Dual Sync Distributor, SBC & BBC
  • (1) Holley Sniper 558-493 EFI Dual Sync Distributor Harness
  • (1) Chevy Distributor Clamp

 

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

  • 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

 

Holley 565-200 EFI Dual Sync Distributor, SBC & BBC

  • Plug and Play with Holley EFI
  • Includes both crank and cam sensors to support sequential EFI operation
  • Hall Effect sensor design provides precise timing control and noise immunity
  • CNC machined billet aluminum housing
  • Integrated LEDs allow for easy setup
  • Available for popular applications
  • Comes with hardened steel distributor gear
  • Precision machined shutter wheel designed for improved accuracy at extreme engine RPM
  • Shutter wheel is pinned and welded to distributor shaft for superior reliability
  • Blank cap available for Coil-On-Plug applications
Note:  If you are running an HEI distributor before you installed the dual sync, you'll need to install an inductive coil such as this MSD 8202 Blaster 2 Ignition Coil.
If installing a CD ignition box, the coil may be paired with the MSD 6-Series such as this MSD 6425 6AL Digital Ignition Control Box.

 

Holley Sniper 558-493 EFI Dual Sync Distributor Harness

  • Quite literally a snap to put in - Plug and play installation
  • Simply plug both connectors in and you are finished!
  • The pink wire will need to be terminated to a 12 volt ignition source as well

 

Chevy Distributor Clamp

  • Extra heavy duty distributor clamp
  • Gives more hold-down area for your Small Block Chevy (SBC) or Big Block Chevy (BBC)

 

 

Holley Sniper 550-511 EFI 4150 4-Barrel Self-Tuning Base Kit (more 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 565-200 EFI Dual Sync Distributor, SBC & BBC (more details)

Introducing the next generation of Holley EFI Dual Sync Distributors, the new design features an improved shutter wheel, high-quality dual Hall Effect sensors, and an MSD cap and rotor! While these distributors are designed to be used primarily in sequentially injected installations, you can easily use them as a crank trigger for TBI system also. The precision machined shutter wheel design ensures accurate timing, even at very high engine speeds. The Gen 2 Dual Sync also included a QPQ coated shutter wheel for superior corrosion resistance, and the wheel has been pinned and welded to the shaft for increased reliability. These distributors can also be used with other EFI systems that support Hall Effect crank and cam sensor inputs. Do you need to a bronze gear for your billet cam? No problem, these distributors maintain MSD shaft diameters, making it easy to source a bronze gear!
 

Charts

Specifications

KEY SPECS
BrandHolley Sniper
GENERAL
Carburetor Flange Type4-Barrel Square Bore
Injection StyleThrottle Body
User TunableYes
Self TuningYes
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 IncludedNo
Fuel Rails IncludedNo
Calibration Module IncludedYes
ECM IncludedYes
Wiring Harness IncludedYes
Fuel Pressure Regulator IncludedYes
Distributor IncludedYes
MAP Sensor IncludedYes
IAC Motor IncludedYes
IAT Sensor IncludedYes
TPS Sensor IncludedYes
Use with Power AdderNo
Max Horsepower Rating650
ColorBlack
Throttle Body Barrels4-Barrel
Sold in QuantityKit