Truck owners and mechanics, this crankcase ventilation filter is a must-have for maintaining your heavy-duty rig! The part number 904-7904 is compatible with a ton of trucks including Freightliner Cascadia, Columbia, International ProStar, Peterbilt 387/389, Kenworth T680/T800, Volvo VNL, and many more from around 2008-2013. It replaces several OEM numbers like 3691476, 99340, CB57, and others. This aftermarket filter is built with quality materials that resist heat and oil, so it holds up well under tough conditions. The design matches the original equipment specs perfectly, so installation is straightforward - no modifications needed. Using a fresh crankcase ventilation filter helps your engine breathe properly, which can improve performance and fuel efficiency over time. It's crazy affordable compared to buying from the dealership, and the quality is actually really solid. Just make sure to double-check that your specific truck model and year are in the compatibility list before ordering. Even though it's not genuine OEM, it meets or exceeds the original standards and should last just as long. Keeping your crankcase ventilation system clean is crucial for engine health, and this filter makes maintenance easy and budget-friendly. Definitely a smart buy for any truck owner who does their own maintenance or wants to save on repair costs.