Detroit Diesel Secondary Fuel Filter Base Head (Cast 5148171) - Used

Detroit Diesel-style secondary spin-on fuel filter base / filter head, cast aluminum, with `SECONDARY`, `IN`, and `OUT` cast into the body and a cast number reading 5148171. Single center filter stud, separate inlet and outlet ports, and a two-bolt mounting foot.

Application: Detroit Diesel fuel filter installations (6V-71 / 8V-71 family is a commonly cited application for this style of base) — application not verified. Sold by photographs, cast identifiers, and dimensions.

Condition: Used, untested take-off. Bare cleaned aluminum with light handling marks and a green paint witness mark. No filter, fittings, gaskets, or hardware included. No crack, thread, or pressure testing has been performed.

Note: the number cast into this part is a casting number, not a confirmed orderable OEM service number.

Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase.

Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.

Quote is subject to final fitment confirmation by engine/transmission serial number, part number, photos, and supplier availability.