Holley Sniper Stealth 4150 - Shiny Finish - Part# 550-870

Holley Sniper Stealth 4150 - Shiny Finish - Part# 550-870

4 Barrel Fuel Injection Conversion - Self-Tuning Kit + Handheld EFI Monitor - Shiny Finish

PART# 550-870

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, improving idle stability, drivability, and wide-open throttle horsepower! Did we mention that the Stealth 4150 also includes transmission kick down provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications.

For a complete installation, Master Kit part # 550-870K includes a complete fuel system with an external fuel pressure regulator preset to 58.5psi, 20ft of 3/8" Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware, and bulkhead fitting to return fuel into the tank!
Bolt on 4150 Flange Carburetor Replacement
Throttle body mounted ECU – no extra boxes to mount
Supports up to 650hp with Four 100 Lb/Hr Injectors!
Includes high pressure fuel crossover line
All of the wiring exits below the rear fuel injector cover, for a completely stealth installation.
Timed spark part for vacuum advanced distributors located under the front fuel bowl, for easy access to the distributor.
Air entry is machined to fit most stock style air cleaners with air cleaner locator provisions.
Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
An external fuel pressure regulator is required, set to a base pressure of 58.5 PSI, e.g. 12-886.
Integrated ignition timing control
High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays
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!
Self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI!
The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
OEM Style TPS/IAC for years of dependable service.
Included clamp-on oxygen sensor kit for 2.25" exhaust ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
vailable in 3 finishes: Shiny, Black and coming soon, Gold

Brand Holley Sniper EFI
CFM 870
Emission Code 3
Finish Shiny
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 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
Part Number 550-870


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