Modern 4X4s need to breath easy. With the advanced technology now crammed in under the bonnet such as hundreds of sensors willing to send your powerful new truck into limp mode the moment something isn’t perfect, it’s vital for clean air to be reaching its heart. While some manufacturers have had very well publicised issues with air filters (oh what a feeling), all 4WDers should be wary of the health of their air filters. Thankfully, if you drive a 2018-19 2.0-litre Ranger or a 3.2-litre Everest, Unifilter have provided a replacement option. They have released a dual-stage replacement foam air filter, which has a polyurethane frame to provide a complete seal with the airbox, and is claimed to improve airflow, filtration, and fuel economy. So next time you check your air filter and it’s looking worse for wear, check out Unifilter’s replacement options.