Holley Sniper 550-510 EFI 4150 4-Barrel Self-Tuning Base 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!

• 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
• Sold individually

• Quickstart Guide (PDF)

• Instruction Manual (PDF)

• Wiring Instructions (PDF)

KEY SPECS
MFG. Part #	550-510
Brand	Holley Sniper
Injection Style	Throttle Body
CFM	800 CFM
Injector Size	100 lbs./hr.
Max Horsepower Rating	650
ECM Included	Yes
GENERAL
Carburetor Flange Type	4-Barrel Square Bore
User Tunable	Yes
Self Tuning	Yes
Injectors Included	Yes
Intake Manifold Included	No
Metering Style	Speed density
EGR	No
Throttle Body Included	Yes
Throttle Body Material	Cast Aluminum
Throttle Body Finish	Polished
Venturi Quantity	4
Fuel Pump Included	No
Fuel Rails Included	No
Calibration Module Included	Yes
Wiring Harness Included	Yes
Fuel Pressure Regulator Included	No
Distributor Included	No
MAP Sensor Included	Yes
IAC Motor Included	Yes
IAT Sensor Included	Yes
TPS Sensor Included	Yes
Finish	Polished
Use with Power Adder	No
Throttle Body Barrels	4-Barrel
GTIN Code	090127739860