Holley Sniper HO550-870 EFI Stealth 4150 Fuel Injection System
Holley Sniper HO550-870 EFI Stealth 4150 Fuel Injection System
Holley Sniper EFI Stealth 4150 fuel injection systems feature four 100 lb.-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! This system also includes transmission kickdown provisions for GM TH350/400, 200R4/700R4 and Ford C4/C6 applications. The 4150 is available individually, or in a complete Master Kit (see contents listed below).
ALL Sniper EFI Stealth 4150 systems feature:
- Bolt on 4150 flange carburetor replacement
- Throttle body mounted ECU; no extra boxes to mount
- Supports up to 650 hp with four 100 lb.-hr. injectors
- 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 four wiring connections required (battery +, battery - , switched ignition, and rpm)
- External fuel pressure regulator required, set to a base pressure of 58.5 psi, such as 12-886
- Integrated ignition timing control
- High-resolution full color touch screen 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 and fuel pressure regulator, for years of dependable service
- Included clamp-on oxygen sensor kit for 2.25 in. exhaust ensures a leak-free oxygen sensor installation, with stainless steel T-bolt clamps and a stainless steel (weldable) oxygen sensor flange
- Available in three finishes: shiny, ceramic black, and classic gold
MASTER KITS also include complete fuel system with an external fuel pressure regulator preset to 58.5 psi, 20 ft. of 3/8 in. Vapor Guard fuel hose, fuel pump, filters, necessary hardware, and bulkhead fitting to return fuel into the tank.
- Maximum Horsepower with Gas:650
- Injection Style:Throttle body
- Timing Control Compatible:Yes
- Power Adder Compatible:Yes
- ECM Included:Yes
- Self Tuning:Yes
- User Tunable:Yes
- Fuel Pump Included:No
- EGR:No
- Transmission Controller Included:No
- Metering Style:Speed density
- Intake Manifold Included:No
- Multi-Port Fuel Rails Included:No
- Throttle Body Included:Yes
- Throttle Body Mounting Flange:4-barrel square bore
- Venturi Quantity:4
- Airflow Rate (cfm):870 cfm
- Throttle Body Material:Cast aluminum
- Throttle Body Finish:Polished
- Injectors Included:Yes
- Injector Size (lbs/hr):100 lbs./hr.
- Calibration Module Included:Yes
- Wiring Harness Included:Yes
- Oxygen Sensor Included:Yes
- Fuel Pressure Regulator Included:No
- Distributor Included:No
- MAP Sensor Included:Yes
- IAT Sensor Included:Yes
- TPS Sensor Included:Yes
- IAC Motor Included:Yes
- Quantity:Sold as a kit.
Manufacturer Part Number:
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