Holley HLY554-100 NTK O2 Sensor

Holley HLY554-100 NTK O2 Sensor is listed by Motorstate as a Oxygen Sensors for catalog matching by brand, part number, and product name. Use this source-backed listing when comparing Holley components in the Oxygen Sensors category. The manufacturer part reference is 554-100, while the Motorstate part number is HLY554-100. Catalog description context: Oxygen Sensor - Wideband - NTK - Holley Commander 950 - Each. No vehicle compatibility is stated here unless it is present in separate fitment data.