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Replacement Parts for HLY-550-928

Holley Terminator X MAX Engine Management Systems 550-928

4.5 out of 5 stars ( 10 )

Part Number: HLY-550-928

Estimated Ship Date: Monday 10/19/2026

$2,199.95

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Wiring Harnesses. Holley EFI, Replacement, Wideband O2 Adapter Harness, Terminator EFI Systems, Pre-Terminated, Plug-and-Play, Each

Part Number: HLY-558-463

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 10/19/2026 if shipped by air

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Estimated Ship Date: Monday 10/19/2026 if shipped by air

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