Holley HLY554-157 EFI ECU Bracket - 79-04 Mustang

Holley HLY554-157 EFI ECU Bracket - 79-04 Mustang is listed by Motorstate as a Computers and Components for catalog matching by brand, part number, and product name. Use this source-backed listing when comparing Holley components in the Computers and Components category. The manufacturer part reference is 554-157, while the Motorstate part number is HLY554-157. Confirm the part number, brand, and product category against your vehicle or build requirements before ordering. No vehicle compatibility is stated here unless it is present in separate fitment data.