Holley Sniper 550-527 EFI 4150 Dual 4-Barrel Self-Tuning Kit

Introducing Sniper EFI 4150 2x4! Looking to convert your draw-through dual carbureted blower engine to EFI? Do you have a Tunnel Ram with dual quad carbs? Look no further! The Sniper EFI 4150 2x4 system from Holley features 8, 100LB/HR Fuel Injectors capable of supporting 1250 HP on both naturally aspirated and forced induction applications. The Sniper EFI 4150 2x4 was designed for use on naturally aspirated engines, while the Super Sniper EFI 4150 2x4 system was developed for both naturally aspirated and draw through supercharged applications. Every Sniper EFI can be used with free downloadable Sniper EFI Software, giving you unlimited control of your engine. Super Sniper EFI 2x4 comes with a USB to CAN tuning cable allowing for live engine tuning.

Features:

• Supports up to 1250 HP with Eight 100 Lb/Hr Injectors
• Internal MAP Sensor
• Integrated ignition timing control
• Built in Single stage progressive nitrous control
• Programmable Target Air Fuel Ratios & Ignition Timing per Boost level
• USB to CAN Communication cable included for easy laptop tuning
• Single Throttle body mounted ECU, with easy connections between the two throttle bodies – no extra boxes to mount
• Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
• Fits on intake manifolds with flange spacing between 6.43"-13.5" (Including most Edelbrock Manifolds)
• Intake Manifold NOT included.  Shown in photos for installation reference only.
• Requires an external fuel pressure regulator: P/N 12-848 up to 800 HP, 12-851 for 1000+ HP
• 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 ensures a leak free oxygen sensor installation, with Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor flange
• Patent Pending

Quickstart Guide (PDF)

Instruction Manual (PDF)