The K&N 33-5028 is a washable, reusable panel air filter for the 3.6L twin-turbo V6 in the Cadillac CTS V-Sport. The manufacturer describes its high air flow while maintaining filtration levels as the design goal, and its layered, oiled cotton gauze media is rated up to 99% efficiency. Because the element is cleaned and re-oiled rather than thrown away, a buyer avoids repeatedly purchasing disposable paper panels. The manufacturer advises cleaning every 75,000 miles under normal highway driving conditions.
Fitment is the main reason to confirm before ordering. The manufacturer says the filter is designed to fit in the stock air box of 2014-2015 Cadillac CTS VSport 3.6L models without any need for modifications, and it cross-references the factory part number 22844634. For DIY owners, the job is a straightforward drop-in: DIY level listed as easy, with a screwdriver and an installation time of 5-10 minutes. Owners on user forums warn that the three cover screws are easy to lose, so a magnet helps, and the coolant hose can be in the way of the latches.
The manufacturer's product page lists fitment for 2014–2018 models, while its CTS V-Sport category page lists 2014–2019. Confirm the model year with the manufacturer before ordering for a 2019 vehicle.
The manufacturer states that the 33-5028 is 50-state emissions legal and will not void the vehicle's factory warranty.
The manufacturer recommends cleaning about every 75,000 miles under normal highway driving. Use K&N cleaner and air filter oil for the service.
Remove the factory filter after loosening the air box cover screws, drop in the K&N, and reseat the cover. Owners on user forums suggest compressing the rubber seal into its channel so the cover snaps into place, and they recommend checking that the cover sits flat before tightening the screws. Plan for a few extra minutes if the coolant hose or intake pipe obstructs the box.
