have been trough the tirals and tribulations with 3 of the main filters here Pros ------ TRD - Better flow K+N - Good flow + Small size ITG - Best flow Cons ------ TRD - Sits too low K+N - none ITG - Open foam = cr@p getting in + BIG FILTER!!!! Price ------ TRD - ~$450 but you get a free CAI ;) K+N - Usually pick up for ~$80 ITG - ~$160 + ~$70 silicon elbow :( Comments ------ TRD - Great filter but the CAI is not made for our car and it sits too low unless you ram it hard up the pipe hence restricting some air fow...or cut the pipe i.e Gravuty Freak Style K+N - Great little filter if you want your fog light in. Perfect fit and great results ITG - This filter is the bees kness of the ones I have used. Lift in 1st gear pulls so fast its not funny. And there are no flat spots going from 160->200k/h