New Buna-N Nitrile Square O-Ring to fit Ford 5.8 engines with Modine "sandwich" oil coolers. This seal fits between the oil cooler and the engine block.

If your oil cooler looks like mine in the second picture, this will fit your truck.

Fits F-150, F-250, F-350, Bronco, Econoline Van with the 5.8/351W engine.

This seal is not available separately from Ford.

I order these custom made here in the USA.

I have sold hundreds of these since 2016 and installed them myself and never had any complaints.

Default/free shipping is via regular postal mail envelope. Tracked and expedited shipping is also available.