Quote:
Originally Posted by Helihover
I run a K&N on my X too. Recently I took off the Throttle body and cleaned it and at that time cleaned the K&N with the re charger kit. I couldn't believe the crap that came out of there. Anyway, you could try the re charge kit instead of buying a new one if you decide to keep the K&N.
After cleaning my TB, air filter, and adding some FI cleaner, my X seem to idle a little smoother 
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I purchased the Dinan cold air box shortly after I bought mine new. It came with a K&N filter. I have driven 112,000 miles. I use the recharger kit once every 5000 miles (Texas is dusty) and replace it after 2-3 cleanings depending on when the new color is not restored by the recharging kit.