Top 7 HOLLEY SNIPER EFI 4150 – Automotive Replacement Fuel Injector Kits

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1. Southwest Speed

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NEW HOLLEY SNIPER EFI SELF-TUNING KIT,800 CFM,BLACK,4BBL,FUEL INJECTION CONVERSION

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Southwest Speed #ad - Inlet/outlet size: 9/16-18 female o-ring an 6 | map sensor: 2bar | max horsepower rating: 650 naturally Aspirated | Model: 4150 EFI Conversion Throttle Body | Product Type: EFI | Transmission: 700R4/200R4.

Holley just brought efi within range! introducing sniper efi! it's economically priced so you can have all the benefits of EFI and still have money to finish or upgrade the rest of your ride! Perfect for street rods, vapor lock, hesitations, muscle cars, off road trucks or nearly any carbureted vehicle. Upgrade to sniper efI and get the tactical accuracy of EFI today! Part #550-511.

Put an end to cold start issues, and flooding. Brand new holley sniper efi self-tuning kit - black ceramic finish, 4 Barrel Fuel Injection Conversion - Self Tuning Kit plus Handheld EFI Monitor. Specs: cfm: 800 | coast guard approved: yes | finish: black | flange style: dual bolt pattern | Fuel Pressure: 58. 5 psi | height: 3. 28" | injector Size: 100 lb. Hr @58. 5 psi.
BrandSouthwest Speed #ad
ManufacturerHOLLEY PERFORMANCE PRODUCTS #ad
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Part NumberHOL-550-511

2. Holley

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Holley 550-511K Sniper EFI Self-Tuning Master Kit

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Holley #ad - Bolt on carburetor replacement designed to fit single & dual carb manifolds. Throttle body mounted ECU - no extra boxes to mount. Integrated fuel pressure regulator. 4wire vehicle connection battery + battery - switched ignition & RPM. Supports up to 650hp 4 injector version and 1250HP 8 Injector version.
BrandHolley #ad
ManufacturerSniper #ad
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Weight20.04 Pounds
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Part Number550-511K
Model550-511K

3. Southwest Speed

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NEW HOLLEY SNIPER EFI STEALTH KIT 4150 MASTER KIT 4 BBL FUEL INJECTION CONVERSION,POLISHED,870 CFM,COMPATIBLE WITH 4150 FLANGE STYLE MANIFOLDS

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Southwest Speed #ad - Injector size: 100 lb/hr @ 58. 5 psi | inlet/outlet size: 3/4-16 female o-ring an 8 | map sensor: 2bar | max horsepower rating: 650 naturally Aspirated | Model: 4150 EFI Conversion Throttle Body | Product Type: EFI | Transmission: 700R4/200R4 Ford C4/C6 TH350 Brand new holley sniper efi stealth 4150 master kit, 4 bbl fuel Injection System, polished, 870 cfm, Fits 4150 Flange Style Manifolds Holley Part #550-870K.

Master kits include complete fuel system with an external fuel pressure regulator preset to 58. 5psi, filters, 20ft of 3/8" vapor guard fuel Hose, Fuel Pump, necessary hardware and bulkhead fitting to return fuel into the tank!. The sniper stealth 4150 efi system from holley features 4, 100lb/hr fuel injectors capable of supporting up to 650 hp naturally aspirated or 600 hp on forced induction applications.

The sniper stealth 4150 ecu is capable of fuel map self-learning and ignition timing control, drivability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, improving idle stability, 200R4/700R4 and Ford C4/C6 applications. Specs: brand: holley sniper efi | cfm: 870 | emission code: 3 | finish: polished | Flange Style: 4150 | Fuel Pressure: 58. 5 psi | height: 3. 28 |.
BrandSouthwest Speed #ad
ManufacturerHOLLEY PERFORMANCE PRODUCTS #ad
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Part NumberHOL-550-870K

4. Southwest Speed

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NEW HOLLEY SUPER SNIPER EFI KIT 650 HP FORCED INDUCTION 4 BBL FUEL INJECTION CONVERSION,POLISHED,800 CFM,700 HP,COMPATIBLE WITH 4150 FLANGE & SPREAD BORE MANIFOLDS

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Southwest Speed #ad - Brand new holley super sniper efi 4150 650 hp forced induction sniper efi 4 barrel Fuel Injection Conversion, Self-Tuning Kit & Handheld EFI Monitor, Polished Holley Part #550-518. Note: e-85 - not Recommended. Introducing holley super sniper efi! looking to convert your blow thru carbureted turbo engine to EFI? Look no further.

Holley offers a 650 hp four injector version for lower horsepower applications with a power adder or someone just needing additional sensor inputs. Specs: brand: holley sniper efi | cfm: 800 | emission code: 3 | finish: polished | height: 3. 28" | injector size: 100 lbs. Hr at 58. 5 psi | inlet/outlet size: 9/16-18 female o-ring AN 6 | MAP Sensor: 2.

5 bar | max horsepower rating: 650 forced induction | product type: Sniper 4BBL TBI Kits | Transmission: 700R4/200R4, TH350 . That's right, no need for a separate nitrous controller! every Super Sniper EFI system also comes with a USB to CAN tuning cable, as well as free downloadable Sniper EFI Software to give you unlimited control of your engine. Did we mention the Super Sniper also has full nitrous control built-in? .
BrandSouthwest Speed #ad
ManufacturerHOLLEY PERFORMANCE PRODUCTS #ad
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Part NumberHOL-550-518

5. Southwest Speed

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NEW HOLLEY SUPER SNIPER EFI STEALTH KIT 4150 4 BBL FUEL INJECTION CONVERSION MASTER KIT,GOLD,870 CFM,COMPATIBLE WITH 4150 FLANGE STYLE MANIFOLDS

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Southwest Speed #ad - Injector size: 100 lb/hr @ 58. 5 psi | inlet/outlet size: 3/4-16 female o-ring an 8 | map sensor: 2bar | max horsepower rating: 650 naturally Aspirated | Model: 4150 EFI Conversion Throttle Body | Product Type: EFI | Transmission: 700R4/200R4 Ford C4/C6 TH350 Specs: brand: holley sniper efi | cfm: 870 | emission code: 3 | finish: gold | flange style: 4150 | fuel pressure: 58.

5 psi | height: 3. 28 | injector size: 100 lb/hr @ 58. 5 psi | inlet/outlet size: 3/4-16 Female. The sniper stealth 4150 ecu is capable of fuel map self-learning and ignition timing control, drivability, improving idle stability, 200R4/700R4 and Ford C4/C6 applications. The sniper stealth 4150 efi system from holley features 4, and wide-open throttle horsepower! did we mention that the stealth 4150 also includes transmission kick down provisions for GM TH350/400, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications.

Brand new holley super sniper efi stealth 4150 4 bbl fuel injection master kit, Gold, 870 CFM, Compatible with 4150 Flange Style Manifolds Holley Part #550-872K. Master kits include complete fuel system with an external fuel pressure regulator preset to 58. 5 psi, fuel pump, 20 feet of 3/8" vapor guard fuel Hose, Filters, necessary hardware & bulkhead fitting to return fuel into the tank!.
BrandSouthwest Speed #ad
ManufacturerHOLLEY PERFORMANCE PRODUCTS #ad
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Part NumberHOL-550-872K

6. Holley

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Holley 550510 Electronic Fuel Injection

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Holley #ad - A flame arrestor is required for marine installations, such as part number, 720-1 or 720-13. Throttle body mounted ecu – no extra boxes to mount. Self-tuning ecu means you don't have to be a computer/tuning wiz to have efi! simple Calibration Wizard Answer a few questions about your engine and it creates the base map, then starts tuning on its own! - NO laptop required! Note : Refer to the PDF attached below in Technical Specification for User Manual.

Dual pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds - Spread Bore Sealing Plate Part #9006 is recommended. Supports up to 650hp with four 100 lb/hr injectors! Only 4 wiring connections required! battery +, battery -, switched ignition & RPM.
BrandHolley #ad
ManufacturerSniper #ad
Height8 Inches
Length12 Inches
Weight9.02 Pounds
Width11 Inches
Part Number550-510
Model550-510

7. Southwest Speed

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HOLLEY SNIPER EFI STEALTH KIT 4150 4 BBL FUEL INJECTION CONVERSION,GOLD,870 CFM,COMPATIBLE WITH 4150 FLANGE STYLE MANIFOLDS

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Southwest Speed #ad - The sniper stealth 4150 ecu is capable of fuel map self-learning and ignition timing control, improving idle stability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, drivability, 200R4/700R4 and Ford C4/C6 applications.

Brand new holley sniper efi stealth 4150 4 bbl fuel injection system, 870 CFM, Gold, Fits 4150 Flange Style Manifolds Holley Part #550-872. Specs: brand: holley sniper efi | cfm: 870 | emission code: 3 | finish: gold | flange Style: 4150 | Fuel Pressure: 58. 5 psi | height: 3. 28 |. The sniper stealth 4150 efi system from holley features 4, 100lb/hr fuel injectors capable of supporting up to 650 hp naturally aspirated or 600 hp on forced induction applications.

Injector size: 100 lb/hr @ 58. 5 psi | inlet/outlet size: 3/4-16 female o-ring an 8 | map sensor: 2bar | max horsepower rating: 650 naturally Aspirated | Model: 4150 EFI Conversion Throttle Body | Product Type: EFI | Transmission: 700R4/200R4 Ford C4/C6 TH350 .
BrandSouthwest Speed #ad
ManufacturerHOLLEY PERFORMANCE PRODUCTS #ad
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Part NumberHOL-550-872