-5%

Holley Sniper 550-870 Stealth 4150 EFI, Shiny

-5%

#425550870

Holley Sniper 550-870 Stealth 4150 EFI, Shiny

Designed to be a fully bolt-on 4150 Flange Carburetor Replacement
All of the wiring exits below the rear fuel injector cover, for a completely stealth installation
The air entry is machined to fit most stock-style air cleaners with air cleaner locator provisions

Finish / Type:

Shiny

Shiny - W/ Fuel Delivery Black Black - W/ Fuel Delivery Gold Gold - W/ Fuel Delivery

$1,599.95

Factory Shipped

$1,687.95

Save $88.00

Quantity

Need Help? Call to Order

Add to a list

Select a vehicle to verify Fitment

Select Vehicle

Product Summary

Universal Fit, Throttle Body Injection Style, Polished

Designed to be a fully bolt-on 4150 Flange Carburetor Replacement
All of the wiring exits below the rear fuel injector cover, for a completely stealth installation
The air entry is machined to fit most stock-style air cleaners with air cleaner locator provisions
Features high resolution full color touchscreen for initial setup, tuning, and gauge displays
An included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides realtime Fuel Map Learn

See more details

Key Specs

MFG. Part #	550-870
Injection Style	Throttle Body
Injector Size	100 lb/hr @ 58.5 PSI
Max Horsepower Rating	650
ECM Included	Yes

See more specs

Need To Know

Need help?

855.313.9176

View the Help Center

Quick and Easy Returns

Return Policy

Holley Sniper 550-870 Details

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?

Features:

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 port 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)
External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as12-882.
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 realtime Fuel Map Learn!
OEM Style TPS/IAC and Fuel Pressure regulator, 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
available in 3 finishes: Shiny (550-870), Black (550-871), and Gold (550-872)

Charts

Quickstart Guide (PDF)

Instruction Manual (PDF)

Installation Instructions (PDF)

Guides & Documents

Fuel Injection Systems Installation Instructions (425550870)

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CARB warning

Holley Sniper 550-870 Specifications

KEY SPECS
MFG. Part #	550-870
Brand	Holley Sniper
Injection Style	Throttle Body
Injector Size	100 lb/hr @ 58.5 PSI
Max Horsepower Rating	650
ECM Included	Yes

GENERAL
Carburetor Flange Type	4-Barrel Square Bore
CFM	870 CFM
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	Yes
GTIN Code	090127077610
Sold in Quantity	Kit

Ratings & Reviews

Be the first to write a review.

Questions & Answers

Be the first to ask a question.