ORB side of the fitting is radiused for maximum flow of the engines oil and all industry standard thirty seven degree hose ends will seal up to the fitting with no issues. Includes a Buna O-ring with each fitting.
Racer just needs to pick which fitting they need from the drop down menu and RBS will do the rest of the work. Picture two thru six is of #2600-0029O or #2600-0029P.