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CHEVROLET 7-0L-427 CHEVY-SMALL-BLOCK-GEN-III-IV-LS-BASED-ENGINES Engine Management Systems

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Holley HP EFI ECU and Harness Kits 550-603

Engine Management Systems, HP EFI, ECU and Harness, Up to 16-Injectors, 8-Coils, Four Digital Inputs, GM, LS2, LS7, 58x Crank Sensor, Kit

Part Number: HLY-550-603

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025

Engine Management System, LS7 Engine Controller, Chevy, 7.0L, Kit

Part Number: NAL-19354334

Not Yet Reviewed

Estimated Ship Date: Monday 11/10/2025

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Estimated Ship Date: Monday 11/10/2025