Truck owners, this TORQUE air filter is exactly what you need for your Freightliner Cascadia! It directly replaces OEM part numbers AF27879, CA5790, AF56500, LAF6260A, 49478 and several others - just check your current filter's number to make sure it matches. The dimensions are 26.18 x 9.27 x 5.23 inches, so it fits perfectly in the housing without any modification needed. Works with Detroit Diesel DD13 and DD15 engines, plus Caterpillar C15, Cummins ISX15, and several other common truck engines. The construction is solid - pleated filter media that traps contaminants without restricting airflow too much. Regular air filter changes (every 15,000-30,000 miles depending on conditions) are crucial for engine performance and fuel efficiency, and this filter does the job without the dealership price tag. Comes with a 1-year manufacturer warranty for peace of mind. If you're not sure about fitment, just message the seller with your VIN number and they'll confirm compatibility. Much more affordable than buying from the dealer but still provides the protection your expensive diesel engine needs. Keep a spare in your truck for those times when you're on the road and need a quick replacement!