This was probably covered, but, I put my K&N filter in and removed the air silencer. I've been noticing a slugishness when the engine is hot. I really believe some of this came from hot air being sucked through the exposed part of the missing silencer. We all know that having the silencer in is like breathing through puckered lips, so I compromised and took a knife to the air silincer, trimming it so it just reaches into the fender well. Well, the car seems much more responsive when the engine is hot now. I think this set up is as good as any cold air or Denscharger set up. It could all be in my mind, but I'm happy.