Features: Dual Pattern bolt on carburetor replacement, designed to fit 4150 Flange & Spread Bore manifolds - (Spread Bore Sealing Plate Part #9006 is recommended) Self-tuning ECU means you don't have to be a computer/tuning wiz to have EFI! 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! Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM) Throttle body mounted ECU – no extra boxes to mount High Resolution Full Color Touchscreen for Initial Setup, Tuning, and Gauge Displays. Supports up to 650hp with Four 100 Lb/Hr Injectors! Internal fuel pressure regulator eliminates the hassle of plumbing an external fuel pressure regulator (Preset to 58.5 PSI) Integrated ignition timing control & coil driver Available in base & master kits (Master kits include complete fuel system consisting of; 20ft of 3/8" Vapor Guard Fuel Hose, 12-920 Fuel Pump, Filters, necessary hardware and bulkhead fitting to return fuel into the tank!) 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 Certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance. Making Sniper EFI the perfect choice for carburetor to marine fuel injection conversions! A Flame Arrestor is REQUIRED for marine installations, such as part number, 720-1 or 720-13 Patent Pending