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Description: This pre-filter is made to cover the new air intake on Peterbilt models 379, 378, 377, 386, 389 and 388. On these trucks this is located on the passenger side and sometimes behind the environment filter container. 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 proof, filters debris down to. 005′, Is shatter evidence in freezing temperatures, and resists heat up in order to 450 degrees. The material is puncture resistant plus has elasticity characteristics allowing the threads to return to the original position when the threads have been afflicted or shifted.