Mopar filters are designed using FCA US LLC engineering specifications, which means they can help maintain peak engine efficiency and performance. The inside of the MO-339 Filter is a lubricated seal gasket; this is to provide better torque removal and easy replacement. It also has an anti-drain back valve that helps prevent dry starts. The maximum dirt retention feature is engineered with a high dirt retention capacity for longer service intervals and severe driving conditions. Lastly, the MO-339 has a fluted case that allows easy installation and removal.