I'll comment about this specifically for Airtreks or Evos. I've been using K&N drop in since I got the Airtrek 5 years ago. Never tried open pod before, and now itchy handed.
Greeting all..i'm newbie here..my brother just bought skyline r34 gtt...my brother and i have same interest.. we are interested to meet the other Skyline Gtr R34 owners.. feel free to pm me.. i live near Pantai...