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Sniper EFI 550-870K Stealth 4150 Self-Tuning EFI System Master Kit Shiny

(Ford F-150 1975-79, 1984-87, Mustang 1964-73, 1983-85, F-250 1955-66, 1973-79, 1983-87, Bronco 1984-87, Thunderbird 1955-76 + 581 more models)

Manufacturer

Picture for manufacturer Sniper EFI

Part Number

550-870K
9 reviews
Sale Price

$1,899.95

4 left at this price

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Usually delivered within 2 days

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Product Details

The Sniper EFI 550-870K Stealth 4150 Master Kit delivers a complete bolt-on electronic fuel injection solution for carburetor-equipped engines. This self-tuning EFI system supports up to 650 horsepower with four 100 lb/hr injectors and features integrated ignition timing control for optimal performance.

Key Features:

  • Direct bolt-on replacement for 4150-flange carburetors with no complicated fabrication
  • Throttle body-mounted ECU eliminates extra boxes and simplifies installation
  • Self-tuning ECU with real-time fuel map learning requires no computer tuning expertise
  • Genuine Bosch LSU 4.9 wideband oxygen sensor included for precise air/fuel monitoring
  • OEM-style throttle position sensor, idle air control, and fuel pressure regulator for reliable operation
  • Shiny finish complements traditional engine bay aesthetics
  • Air entry machined to fit most stock-style air cleaners with locator provisions

This master kit includes everything needed for installation. Requires an external fuel pressure regulator set to 58.5 PSI base pressure (sold separately). The Sniper Stealth 4150 combines modern EFI technology with classic styling, making it ideal for hot rods, muscle cars, and street performance applications.

Products specifications

Fits

Ford F-150 1975-79, 1984-87, Mustang 1964-73, 1983-85, F-250 1955-66, 1973-79, 1983-87, Bronco 1984-87, Thunderbird 1955-76, F-350 1955-79, 1983-87, Galaxie 500 1962-64, 1968-74, F-100 1955-66, 1973-76, 1979, Fairlane 1955-70 + 577 more models

Accelerometer Support

No

Boost Control

No

Brand

Holley Sniper EFI

CAN-BUS Support

No

Category

Air and Fuel Delivery

CFM

870

Coil Per Cylinder Ignition Support

No

Datalogging Support

Yes

Distributor Included

No

Dry Nitrous Control

Yes

e85 Support

No

EGT Support

No

Emission Code

3

Finish

Shiny

Flange Style

4150

Forced Induction Support

Yes

Fuel Filter Included

Yes

Fuel Hose Included

Yes

Fuel Injectors Included

Yes

Fuel Pressure

58.5 PSI

Fuel Pressure Regulator Included

Yes

Fuel Pump Flow Rating

240 LPH

Fuel Pump Included

Yes

Fuel Pump Type

Inline

Grade Type

Performance

Height

3.28"

Ignition Timing Control

Yes

Individual Cylinder Fuel Corrections

No

Injector Size

100 lb/hr @ 58.5 PSI

Inlet / Outlet Size

3/4-16 Female O-Ring (AN 8)

Intake Manifold Included

No

Knock Retard Support

No

MAP Sensor

2 Bar

Max Horsepower Rating

650 Naturally Aspirated

Model

4150 EFI Conversion Throttle Body

Multi-Stage Nitrous Control

Yes

Part Type

Fuel Injection Conversion Kit

Product Type

Sniper Stealth EFI 4150 Master Kit

Progressive Nitrous Control

Yes

Self-Tuning

Yes

Sub Category

Service Kits

Throttle Position Sensor Included

Yes

Traction Control Support

No

Transmission

700R4/200R4, Ford C4/C6, TH350

User-Tuneable

Yes

Warning

California Proposition 65

Wet Nitrous Control

Yes

I've had a really good experience dealing with Boat Plecity The product they sent me is exactly what I ordered. I have installed it and it works perfectly. Thank you again.

Thanks

Quick and easy / Affordable

Great service from chat

Product is at the harbor haven't seen it yet.

I was totally pleased with the service and the price.

2nd time ordering and have had a great experience both times

The part description was accurate and we got the parts in a timely manner.

Decent price fast shipping A+ seller

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