2008 Audi RS4 4.2L V8 Air Filter

2008 Audi RS4 4.2L V8 Air Filter
  • Designed to increase horsepower & torque for the 2008 Audi RS4 with the 4.2L engine.
  • Washable & Reusable
  • This K&N RS4 air filter lasts the lifetime of your vehicle.
  • Million Mile Limited Warranty with use on Street Vehicles
K&N air filters for 2008 Audi RS4 models are easy to install because they simply drop into the factory air box. A K&N Audi performance filter should be your first performance accessory!

Your 2008 Audi RS4 deserves a K&N! Select the Product Info button below to see everything the air filter fits.

2008 Audi RS4 4.2L V8 - All Models
I got this for my 2006 Audi S4, and it's a perfect fit. For those that are wondering / hearing that the K&N filter doesn't fit in the stock air box on the B7 S4, it does indeed fit, but it helps if you install it in a certain way. I tried dropping it in top first and pushing the bottom edge in, but I couldn't make it fit. But when I tried the other way - inserting the bottom first and then squeezing in the top edge, it was much easier. The top edge of the box must have more flex or something. Considering how difficult it is to replace the filter, and how little room there is to work around the engine, I am thrilled that I can leave the K&N filter in there for 50k miles if I want. Well, maybe I'll check at 30k. I recently went out and purchased K&N for all my other vehicles.
Keith Zollman, Phoenix, Arizona
Replacement Air Filter
K&N 33-2209
  • Designed to Increase Power
  • Million Mile Limited Warranty
List Price: $78.89
Your Price: USD $50.99
In stock