Documenting THE 2008 Audi RS4
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  • Home
  • Performance History
  • General Info
    • Audi Approved Oils
    • Fluid Capacities
    • Maintenance Schedule
    • Manuals & Other Info
    • Production Numbers
    • Vin Decoder
  • Engine & Drivertrain
    • 034 Motorsport Transmission Mount
    • AMD 3" Catback Exhaust
    • AMD 3" Downpipes
    • AMD Clutch
    • AMD Supercharger
    • Engine Compression
    • HSJ Hi-Flow Cats
    • K&N Air Filter
    • Oil & Oil consumption
  • Events & Outings
  • Exterior
    • Fog Light Upgrades
    • Front Plate Delete
    • Laser Interceptor >
      • Overview
      • Rear Sensors
      • Interior Install
      • Front Sensors
    • LED City Lights
    • LED DRL's
    • LED Tail Lights
  • Interior
    • Dome Light Rattle Fix
    • P3cars Vent Gauge
    • Stereo Upgrade
    • V1 & VoodooTec Display
    • Ziza Interior LED's
  • Miscellaneous
    • P310B: Fuel Sensor Gone Bad
    • Gas Mileage
    • VAG-COM Changes
    • Wish List
  • Photos and Videos
  • Wheels, Brakes & Suspension
    • Current Setup
    • PSI Racelines Ohlin TTX36
    • Rotor Repair (Attempted)
  • Contact Me
  • Mods & Maintenance List​

K&N Air Filter  // 01.21.2012

Yes, I went ahead and did the high horse power gaining K&N air filter install ;-) Purchased the K&N 33-2209 from Amazon and installed it tonight. What I was most surprised about was what I found in the air duct screen that leads into the airbox.

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I would've thought there might be some debris in there, but never thought it'd be that much. Wonder how much HP I gain with just cleaning that out?

Anyway, nothing too eventful from there. Had this awaiting me within the air box:

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Nonetheless, a good fit and we're done. I'll update this once I've driven a bit on it.
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Nice and clean
And found it a bit interesting how skinny the K&N is in comparison to stock (is that the reason for the supposed performance advantage? ..or potential reason why it might be 'bad' (less material to catch things?) :
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K&N to left, Stock on right
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