Peterbilt Model 379, 378, 377, 386, 389, 388 Fresh Air Filter Pre-filter

Made to cover Peterbilt models 379, 378, 377, 386, 389 and 388.

The pre-filter is constructed with 1/8 inch thick ABS plastic for durability and uses our same uniquely designed pre-filter material. Installs on the passenger side exterior.

If you have external air cleaners on this will install behind your passenger side cleaner.

Pre-filters are designed to enhance the efficiency of any performance or exposed air filter.

The pre-filter is constructed with a proprietary polyester mesh with uniform micron openings, treated with a hydrophobic water-repellent process.

The mesh is UV resistant, filters debris down to .005", is shatter proof in freezing temperatures, and resistant to heat up to 450 degrees.

The material is puncture resistant and has elasticity characteristics allowing the threads to return to the original position in the event the threads have been impacted or shifted.