The K&N 57-2597 is a 57 Series fuel-injection performance kit (FIPK) for the 2017-2019 Ford F-250, F-350, and F-450 Super Duty with the 6.7L V8 diesel. It replaces the factory air filter and intake tube with a roto-molded, high-density polyethylene (HDPE) tube and a custom heat shield, and it uses a washable, oiled cotton-gauze filter. The manufacturer lists an estimated 23 lb-ft torque gain and states the kit is guaranteed to increase horsepower and torque. Owners on user forums are divided on oiled filters for the 6.7L, with some warning that oil can foul the MAF sensor and that fine dust can reach the turbo, so weigh that against the stock box if you tow or run a tune. For a buyer searching for a 2017 F250 6.7 cold air intake, 17-19 F350 Powerstroke CAI, or a K&N 57 series intake for a tuned 6.7, this kit offers a filter you clean rather than replace, with the manufacturer's 100,000-mile service interval under normal highway driving.
Installation is a bolt-on job that the manufacturer says takes under 60 minutes with simple hand tools. The kit comes with an installation instruction sheet, and the heat shield keeps intake air away from engine bay heat. Plan to disconnect and transfer the mass air sensor to the new tube, and follow the sheet's routing and clamp steps closely, since the sensor must face the filter. Keywords: 6.7 Powerstroke cold air intake, K&N 57-2597 install, 2017-2019 F350 6.7 intake, washable oiled air filter, Super Duty CAI, 6.7 diesel MAF sensor.
Yes. The manufacturer states the system replaces the factory air filter and intake tube, so no separate box or tube is needed.
The manufacturer specifies cleaning only every 100,000 miles under normal highway driving conditions. Harsher or dustier use will call for more frequent service.
The manufacturer lists the kit as legal for use in all 50 US states.
Opinions on user forums are mixed. Some owners report clean, trouble-free use after cleaning, while others warn that oil can contaminate the MAF sensor and that fine particles can reach the turbo. Clean and oil the filter carefully, and confirm the approach with the manufacturer if you have concerns.
The manufacturer says the full system can typically be installed in under 60 minutes with simple hand tools, and an installation instruction sheet is available. Expect to remove the factory air box components, fit the custom heat shield, and move the mass air sensor to the new tube, then secure the hoses and clamps. Check for air leaks after startup. Because owners on user forums stress the importance of keeping the MAF sensor clean and correctly oriented, inspect the sensor during the swap. Confirm the exact steps against the instruction sheet before you begin.
