A 6.7 crankcase filter is a vital component in diesel engines, such as the 6.7L Cummins, designed to capture oil mist and contaminants from crankcase gases. It helps prevent sludge buildup, improves engine efficiency, and reduces emissions. Regular replacement is essential for optimal performance. https://mopartruckfilters.com/products/6-7-cummins-crankcase-filter