Holley 558-328 HyperSpark Plug-and-Play Main Harness Features:

• Requires only four flying lead connections: Battery +, Battery -, Switched 12 V, and Fuel Pump Power—everything else plugs in via the harness. :contentReference[oaicite:3]{index=3}
• Pre-terminated connectors for HyperSpark coil, distributor, ignition box and the Sniper throttle body I/O—minimizes wiring errors and reduces install time. :contentReference[oaicite:4]{index=4}
• Built-in 40 A power relay and fused power path protect the system and simplify integration. :contentReference[oaicite:5]{index=5}
• Designed exclusively for Sniper 1 EFI systems—**not** compatible with Sniper 2 EFI. :contentReference[oaicite:6]{index=6}
• Legal for sale and use in uncontrolled (non-emissions controlled) vehicles. Not legal for emissions-controlled systems in certain regions. :contentReference[oaicite:7]{index=7}

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART