A set of 4 Viton O-rings to re-seal the fuel rail end plugs / banjo bolts located on each end of the cylinder heads.
Genuine Viton O-rings for superior resistance to ULSD and Biodiesel. 4 O-rings will re-seal both heads on the 7.3L engine.
Before ordering, check your truck to see which style of banjo bolts you have. The OLD STYLE banjo bolts with the short shoulder or the NEW STYLE long shoulder.Use the drop down to choose which style you need.If you are not sure or can not check, order 1 package of each to be safe.