Many dealerships will make you purchase the  associated oil or water line on the engine to simply get a replacement o-ring.   With properly calculated fill and stretch rate, we are now offering the orings for the oil and water lines that feed the turbo.  These are commonly needed for full frame or hybrid upgrades, or simply due to a service interval.
 
Oil o-ring is Viton.   
Water o-ring is Buna-N, also commonly known as "NBR"
 
Select from side menu for which o-ring is required
 
Lube each item generously before install.