Not sure which 2005 Cadillac CTS Air Filters are right for you? We have over 14810 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"Recently purchased a K&N stock replacement air filter for my 2005 Cadillac CTS-V. It arrived virtually ready to install. All I had to do was grease the sealing surfaces (grease supplied). I immediately noticed a small increase in the smoothness of the engine. K&N claims a small HP increase, but I did not notice any increase. Have run 2 full tanks with the new filter and noticed virtually no improvement in fuel economy (maybe a +0.1 MPG increase). None of this is meant to detract from my opinion of the filter. It installed as tight as factory OEM and with K&N's million mile warranty, it's nice to know I won't have to buy another filter again. Please note though that regular maintanance is requried (every ~12K miles the filter requires oiling). Eventually (+5 years) I will switch out the entire intake system with a full K&N cold air set-up. Until then, this filter is a good compromise." —Valerie C from Zelienople, PA bought a K&N Air Filters for a 2005 Cadillac CTS.