Holley Sniper 550-872 Stealth 4150 EFI, Gold

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 Super 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 8 injector variation is capable of supporting up to 1250 HP on forced induction applications. The Sniper Stealth 4150 ECU is capable of complete ignition timing control, fuel self-learning, 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?Master Kits include 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 fit's a wide range of factory intake manifolds
• Throttle body mounted ECU - no extra boxes to mount
• Supports up to 650HP with four 100lb/hr injectors or 1250HP with eight 100lb/hr injectors
• Includes high pressure fuel crossover line allowing you to quickly plumb your fuel system
• 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)
• Requires use of external fuel pressure regulator, Holley PN# 12-886 or equivalent, set to a base pressure of 58.5 PSI
• Integrated ignition timing control improves idle stability, drive-ability, and wide open throttle response
• 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
• Also available in Black, PN# 550-871 and Shiny, PN# 550-870 finishes

Quickstart Guide (PDF)

Instruction Manual (PDF)