1970-1988 Monte Carlo Holley Sniper EFI Stealth 4150 Master Kit, Shiny Finish 550-870K

The Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting Monte Carlos with 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 and 200R4/700R4 applications.

Master Kits include complete fuel system with an external fuel pressure regulator preset to 58.5psi, 20ft of 3/8in Vapor Guard Fuel Hose, Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!

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!
• 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)
• 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 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 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 inch exhaust ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange

Specs:

• CFM: 870
• Finish: Shiny
• Flange Style: 4150
• Fuel Pressure: 58.5 PSI
• Height: 3.28in
• Injector Size: 100 lb/hr @ 58.5 PSI
• Inlet / Outlet Size: 3/4-16 Female O-Ring (AN 8)
• MAP Sensor: 2Bar
• Max Horsepower Rating: 650 Naturally Aspirated

Manufacturer Part Number : 550-870K

Part Notes:

Helpful Articles:

• Prepping for Fuel Injection