Product Summary

4-Barrel Square Bore Carburetor Flange Type, Satin

  • It is capable of supporting up to 650 HP
  • Designed to be a direct carburetor replacement
  • Will fit single and dual plane intake manifolds
  • Specifically designed for the 1964-1966 Ford Mustang
  • Tank features a coated galvanized steel construction

Comes as a Kit

Key Specs

Injection StyleThrottle Body
Injector Size100 lbs/hr
Max Horsepower Rating650
ECM IncludedYes

Need To Know

This Product Will Ship Free

Shipping Policies & FAQs

Quick and Easy Returns

Return Policy

Speedway Motors 9100169 Details

EFI Master Tuning Kit

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
  • Chrome finish

Fuel Tank Kit

These all-inlcusive EFI-ready steel fuel tanks from Tanks Inc. take the headache out of converting your classic to modern EFI power. Each kit comes complete with a high-flow (255 liters p/hr) in-tank Walbro pump that supports up to 630 hp. Also included are a sending unit (Ohms will match the make/model/year application of tank), mounting straps, and hose (if applicable).

  • Fits 1964-1966 Ford Mustang
  • 16 gallon capacity
  • 32-3/4" x 24-1/2" x 7-1/2"
  • Coated galvanized steel construction
  • Silver powder coated finish
  • EFI-style internal baffling with 4.3 liter internal fuel tray to prevent fuel pump starvation
  • Fuel pump/sender are recessed in tank for easy installation
  • No modification needed to your car
  • Looks like an OE tank when installed
  • Includes aftermarket 5-bolt sender tuned for original factory fuel gauge
  • Includes genuine Walbro GSS340 electric fuel pump
    • 255 LPH @ 80 PSI
    • Heavy 10 gauge no-warp mounting plate
    • Oven brazed 1/4" NPT supply/return line port fittings
    • Barbed rollover vent valve fitting
    • Up to 100 PSI operation
    • In-tank wiring harness

Kit Includes

(1) Holley Sniper 550-510K EFI 4150 4-Barrel Self-Tuning Master Kit

(1) Tanks MU-HT-Kit-SWM66 1964-66 Ford Mustang Fuel Injection Tank

(3) Black Straight -6 AN Flare to 1/4 Inch NPT Pipe Adapter Fitting


Speedway Motors 9100169 Specifications

MFG. Part #9100169
BrandSpeedway Motors
Injection StyleThrottle Body
Injector Size100 lbs/hr
Max Horsepower Rating650
ECM IncludedYes
Carburetor Flange Type4-Barrel Square Bore
User TunableYes
Self TuningYes
Injectors IncludedYes
Intake Manifold IncludedNo
Metering StyleSpeed density
Throttle Body IncludedYes
Throttle Body MaterialCast Aluminum
Throttle Body FinishSatin
Venturi Quantity4
Fuel Pump IncludedYes
Fuel Rails IncludedYes
Calibration Module 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 Bore1-11/16"
Use with Power AdderNo
Throttle Body Barrels4-Barrel
Sold in QuantityKit