Holley HLY558-400 J1A/B Input/Output Connector

Holley HLY558-400 J1A/B Input/Output Connector is listed by Motorstate as a Engine Wiring Harnesses for catalog matching by brand, part number, and product name. Use this source-backed listing when comparing Holley components in the Engine Wiring Harnesses category. The manufacturer part reference is 558-400, while the Motorstate part number is HLY558-400. Catalog description context: EFI Wiring Harness - J1A/B - Holley Dominator EFI - Each. No vehicle compatibility is stated here unless it is present in separate fitment data.