Good question. Cummins Filtration has been manufacturing a proprietary media called StrataPore since the early 1990's out of the Cookeville, TN facility...obviously it has evolved some over the years and our media engineers have improved the grades over time, but the idea is still the same from those early days. It is a multi-layered media that provides gradient filtration...each layer targets finer and finer contaminants to provide high efficiency particle removal while also providing low flow restriction and high capacity; this balance between efficiency/capacity/restriction is critical in designing the optimum filter. The cool thing about StrataPore is that it is 100% polymeric/synthetic meaning the fibers are continuous and won't degrade over time because they are highly resistant to liquids and use no resins or glues to hold broken fibers together like how cellulose and micro-glass media types are constructed.
As far as I know, we don't really use StrataPore in light duty applications today...maybe in some legacy RAM truck applications, but I would have to check part numbers. While there are Fleetguard crosses to light duty/passenger cars, that pass car world is a whole different ball game in terms of volume and profits so we don't really play in that space as much as companies like Mahle, Mann + Hummel, etc.