Not sure which 2004 Cadillac CTS Air Intake Systems are right for you? We have over 15237 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:
"The product was delivered in a fair amount of time (less than a week). Installation was fairly easy, just make sure you review the installation instructions first. When removing the stock "air box" it became quite clear as to how restrictive it really was! After installing the new AirCharger kit it was obvious the engine was getting A LOT more air. Didn't noticed a major increase in hp, however, I started off with 400hp to begin with. I am pleased with the product knowing my car can breath properly now. Would I recommend it? Absolutely. Good value for the money. One more recommendation...I added a Magnaflow cat-back exhaust which also helped. If you allow more air into the engine, you must let it out. That's when you'll notice gains in hp!" —Brian A from Maple Grove, MN bought a K&N 63 Series AirCharger High-Flow Intake Kit for a 2004 Cadillac CTS.