$175 Off

Holley Sniper 550-842 EFI Stealth 4500, Black Ceramic Finish

$175 Off

#425550842

Holley Sniper 550-842 EFI Stealth 4500, Black Ceramic Finish

Features a programmable launch control via 2-step and timing retard
The self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI
Genuine Bosch LSU 4.9 wideband oxygen sensor provides realtime fuel map learn

$2,299.95

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$2,474.95

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Product Summary

Universal Fit, Throttle Body Injection Style

Features a programmable launch control via 2-step and timing retard
The self-tuning ECU means you don’t have to be a computer/tuning wiz to have EFI
Genuine Bosch LSU 4.9 wideband oxygen sensor provides realtime fuel map learn
Has user friendly Boost Control with handheld adjustability
Includes a high resolution full color touchscreen for initial setup, tuning, and gauge displays

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Key Specs

MFG. Part #	550-842
Injection Style	Throttle Body
Injector Size	100 lb/hr @ 58.5 PSI
Max Horsepower Rating	350
ECM Included	Yes

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Holley Sniper 550-842 Details

Introducing the Sniper Stealth 4500 EFI System! Wanting to convert your Dragster or Pro-street vehicle to Fuel Injection? Look no further! The Sniper Stealth 4500 EFI system from Holley features 8, 100LB/HR Fuel Injectors capable of supporting 800 to 1500 HP naturally aspirated, or 800-1250 HP on forced induction applications. The Sniper Stealth 4500 also features multiple Input and Output options for sensor inputs and switched outputs to control external relays. This system also comes with a USB to CAN tuning cable and free downloadable Sniper EFI Software give you unlimited control of your engine

Features

Supports up to 1500 HP Naturally Aspirated or 1250 HP Forced Induction with Eight 100 Lb/Hr Injectors
Compatible with Draw through or Blow through forced induction applications
2.125” Throttle Plates, Flow 1440 CFM for large cubic inch engines
2.5Bar MAP Sensor
Integrated ignition timing control
Programmable launch control via 2-step and timing retard. Both can be triggered by a trans-brake input
Gen 3 Ultra Dominator Style 4 Bolt Air Cleaner Flange
-8AN Fuel Inlets
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
Built-in Single Stage Wet or Dry progressive nitrous control
Three Programmable 0-5V Sensor Inputs for Oil/Fuel/Dome or Nitrous Pressure or other critical information
Six Programmable Ground Outputs, Five programmable ground inputs. These can be used to trigger or control external devices such as nitrous solenoids, boost control solenoids. Or to provide the ECU with an Input to turn on function such as an ignition timi
One +5v Reference Output - +5V Power Supply for 0-5v Sensors, One Sensor Ground – Ground supply for 0-5v Sensors
Throttle body mounted ECU – no extra boxes to mount
Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
Required external fuel pressure regulator, 12-848 is recommended
Customizable secondary fuel pump output (TPS, RPM or Boost enabled)
User friendly Boost Control with handheld adjustability
Free Software included comprehensive datalogging tool to help you maximize the performance of your engine
Real-time datalogging to the included 3.5” Touch Screen, allows you to save information to the SD card without needing a communication cable
Programmable Target Air Fuel Ratios per Boost level
Advanced boost control available via free Sniper EFI tuning software, including Boost vs RPM and Boost vs Time
OEM Style TPS/IAC, for years of dependable service
Included clamp-on oxygen sensor kit ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
Patent Pending

Charts

Instruction Manual (PDF)

Quickstart Guide (PDF)

Installation Instructions (PDF)

Guides & Documents

Fuel Injection Systems Installation Instructions (425550842)

Choosing an Electronic Fuel Injection Retrofit for Your Street Rod or Muscle Car

Fuel Injection Systems Installation Instructions (425550842)

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.

CA Prop 65

CARB warning

Holley Sniper 550-842 Specifications

KEY SPECS
MFG. Part #	550-842
Brand	Holley Sniper
Injection Style	Throttle Body
Injector Size	100 lb/hr @ 58.5 PSI
Max Horsepower Rating	350
ECM Included	Yes

GENERAL
Carburetor Flange Type	4-Barrel Dominator
CFM	580 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	Powder Coated
Venturi Quantity	2
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	No
TPS Sensor Included	Yes
Use with Power Adder	No
GTIN Code	090127021293
Sold in Quantity	Kit

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Is it E-85 compatible, I have a 496 BBC, with aluminum heads and a solid roller with about 270 degrees of duration @050

by Leroy

• 4 years ago

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