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Holley EFI Terminator Stealth Main Wiring Harnesses

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Holley EFI Terminator stealth main wiring harnesses are the direct connection for Terminator Stealth EFI systems. They are also perfect for anyone wanting to convert their 2 x 4 supercharged combo over to EFI. These harnesses are plug-and-play, provide a clean finished appearance, and allow for a quick install.

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Holley EFI Terminator Stealth Main Wiring Harnesses 558-121

Fuel Injection System Wiring Harnesses, Holley EFI, Terminator Stealth 2x4, Upgrade Main Harness, Plug-and-Play, Universal, Kit

Part Number: HLY-558-121

Not Yet Reviewed

Estimated Ship Date: Monday 12/15/2025

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Estimated Ship Date: Monday 12/15/2025

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