Doc's Auto Parts MaxFlow Performance Engine Air Filter DA6152X 1986-1999 The DEF Guard Additive helps

The DEF Guard Additive helps prevent DEF crystallization that can clog the DEF filter

It removes fuel system deposits that reduce fuel economy and asphaltenes that plug fuel filters

Doc's Diesel Transmission Service Kits:

Provides increased oxidation resistance

conventional

Doc's Auto Parts MaxFlow Performance Engine Air Filter DA6152X 1986-1999 The DEF Guard Additive helpsDocs Auto Parts MaxFlow Performance Engine Air Filters: Get more out of your engine with Docs Auto Parts MaxFlow Performance Engine Air Filter. Built to improve airflow, it helps your engine breathe easier for stronger throttle response and better overall performanceespecially when youre working it hard. The pre oiled filter media captures up to twice the dirt of standard paper filters, delivering cleaner air and helping protect your engine for the