B · official + dimensions3 equivalents · 3 brands

OIL FILTER cross-reference — HIFI OLD NUMBER®, FRAM®

HS-SO284one HiStar element — compatible replacement for every part below

OIL FILTER · 3 interchangeable part numbers across 3 brands

Dimensions: OD 176 mm · ID 121 mm · H 208 mm

Typical applications: FIAT

Interchangeable cross-brand part numbers

HIFI OLD NUMBER®

SO 646/1

FRAM®

C 4644

HIFI Filter®

SO 284

Quote source

HiStar Filter® HS-SO284 Request a quote for this part → Prefilled with your part — reply within 24h · low minimums · European supply.

The HIFI OLD NUMBER SO 646/1 oil filter cross-references to HiStar HS-SO284 — a compatible replacement element that also matches FRAM, and 3 interchangeable OEM part numbers in total. Same form, fit and function, OD 176 mm, ID 121 mm, H 208 mm; fits FIAT. Verified against the manufacturer's own cross-reference.