you feel vibration in the car? its not the Filter, I bet money its a mount and was bad BEFORE the intake but the intake made you motor run faster or slower somehow and makes it worse... I bet its the passenger mount BUT maybe the Tranny mount, I doubt its the dogbone.
Car #1 2007 Focus ZX3 SE - Blue 2.3L, Automatic, Toms Tune, OBX headers, FSWERKS Cold Air Intake and Exaust, Loaded
Car #2 2007 Focus ZX3 S - Silver 2.0L, Manual,TOTALED!!!! (Half Rebuilt)
Car#3 Mustang GT 2007 LOADED!