RE: Offical nitro tc3 thread
It's not terrible, but an upgrade is a good investment.
I was running mine and flooded the carb. What I didn't know was that the inner filter got soaked. About 3 minutes into my next run my car started bogging. IT had sucked the inner filter into the carb throat!
I suggest a [link=http://www.motorsaverfilters.com/]Motor Saver[/link] vs. the expense of an K&N the performance and protection difference are neglible.