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Holley EFI Sniper EFI Stealth 4500 Throttle Body System 550-843

Holley EFI Sniper EFI Stealth 4500 Throttle Body System 550-843
Holley EFI Sniper EFI Stealth 4500 Throttle Body System 550-843Holley EFI Sniper EFI Stealth 4500 Throttle Body System 550-843Holley EFI Sniper EFI Stealth 4500 Throttle Body System 550-843
$2,653.99 ea
NEWARRIVING SOONEstimated Ship Date 10/06/2021 (If Ordered Today)30 available from HOLLEY PERFORMANCE PRODUCTS as of 09/20/2021
Model: 4008178
Supplier has not provided any fitment data for this product.
[More Info]
The Sniper Stealth 4500 EFI system 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 features multiple Input/Output options for sensor inputs and switched outputs to control external relays. This system comes with a USB to CAN tuning cable and free downloadable Sniper EFI Software give you unlimited control of your engine. * 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 timing/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.
  • Supports Up To 1500 HP NA Or 1250 HP Forced Induction
  • Eight 100 lb../hr. Injectors
  • Compatible w/Draw or Blow Through Forced Induction Apps.
  • 2.125 Throttle Plate; Flow 1440 CFM
  • Integrated Ignition Timing Control
  • Programmable Launch Control Via 2-Step/Timing Retard
  • Gen 3 Ultra Dominator Style 4 Bolt Air Cleaner Flange
  • -8AN Fuel Inlets
  • Full Color Touchscreen for Initial Setup/Tuning/Gauge Displays
  • Simple Calibration Wizard - No Laptop Required
  • Self-Tuning ECU Means You Dont Have To Be A Computer/Tuning Wiz
  • Bosch LSU 4.9 Wideband O2 Sensor Provides Realtime Fuel Map Learn
Holley Performance Emission Code 3: This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles. The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles: 1965 and older U.S. manufactured California Certified vehicles/1967 and older U.S. manufactured Federally Certified vehicles/1967 and older Foreign manufactured vehicle. The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street. WARNING: It is against the law to install this part on an Emissions Controlled Vehicle. The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles/1968 and newer U.S. manufactured Federally Certified vehicles/1968 and newer Foreign manufactured vehicle
Installation Notes:
Not for use with engines producing less than 800 horsepower Gasoline Only Use of leaded race fuels may shorten the service life of the WBO2 sensor

About Holley Performance Products

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy NASCAR Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution or partnered with products from other Holley companies we can give you the edge you need over the competition!


Download Name File Size



CFM 1440
Coast Guard Approved Yes
Emission Code 3
Finish Classic Gold
Flange 4500
Flange Size 4500
Flange Style 4500
Fuel Pressure 58.5 PSI
Height 3.85"
Injector Size 100 lb/hr @ 58.5 PSI
Inlet / Outlet Size 8AN
MAP Sensor 2.5Bar
Max Horsepower Rating 1250 Forced Induction
Part Type Fuel Injection Throttle Body
Throttle Bore 2.125 in.
WARNING CA Proposition 65 WARNING: Cancer and Reproductive Harm


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Camaro Depot 2021