Black Nozzle Ring For Turbo Detroit HE531V 3781169 ( Isonite Treatment)

It replaces 3781169. If your number is not listed, send it with the old part's dataplate photo and we confirm the match before shipping.

Brand new — new components throughout, not remanufactured. No core deposit and nothing to return.

A 1-year unlimited-mileage warranty against material and workmanship defects, handled directly by our US-based team. Details on the warranty and after-sales page.

Yes. Shops, fleets and resellers get consistent wholesale pricing from US inventory, with white-label support for distributors. Send the part number and quantity for a quote.