How to Install Holley Sniper EFI (& Sniper 2) | Nova SS | EFI System Pro

This expert installation guide by EFI System Pro's Scott Evans provides a clear, step-by-step tutorial on installing the Holley Sniper EFI and Sniper 2 EFI systems. Scott walks you through all essential stages including unpacking the kit, mounting the throttle body with built-in ECU, connecting the wide-band O2 sensor, wiring the minimal power connections, fuel line setup with supply and return, and properly securing all components. The guide also covers key setup details such as configuring ignition timing options, and highlights common installation tips and pitfalls. With detailed instructions and practical advice, this walk through simplifies upgrading from a carburetor to a modern fuel injection system for reliable performance and ease of tuning. #efisystempro #efiinstall #holleysniperefi #sniperefi