Engine Management System Components

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 ( 1 )

Estimated Ship Date: Monday 8/4/2025

Engine Management System Components, 6LS Ignition Adapter Harnesses, Front Wiring Harness Extension, Chevrolet, Small Block LS, Each

Part Number: MSD-2278

Not Yet Reviewed

Estimated Ship Date: Monday 8/4/2025

CCCI HOTWIRE 86/89

Part Number: CEI-102087

Not Yet Reviewed

Estimated Ship Date: Aug 21, 2025 if ordered today

• Special Order

UPGRADE CHARGE, XFI 2.0 FIRMWA

Part Number: FST-301020

Not Yet Reviewed

Estimated Ship Date: Oct 9, 2025 if ordered today

• Special Order