Porsche Oil Return Line - 911 07-11 997-107-028-73 930-110-185-02 The factory updated the springs

The factory updated the springs in 1973

Porsche A16 union for 911 and 912 (1965-1973) models

Porsche Touring High Tech Motor Oil SAE 20W-50 (205L)

Porsche Battery charger wiring

The exchangers have thick exhaust flanges and a bung for the oxygen sensor

Porsche Oil Return Line - 911 07-11 997-107-028-73 930-110-185-02 The factory updated the springsOil Return Line For Porsche 997 (2007 2011) Models. Porsche This Oil Return Line (911, 07 11) is an essential part of your engine's oil flow system. Installed at the base of the oil filter or oil cooler bracket, it ensures proper oil circulation and prevents potential damage. Keep your engine running smoothly and efficiently with this high quality return line.