Well let me share a little story of my brothers need for cold air on his brand new Jetta. In his desire to get cold air he bought an AEM cold air intake that mounted under the bumper. Boy did this thing make a difference! This thing really did a good job! It sounded so mean, well, that was until His first rain storm, driving home from work he seized his engine when it hydra- locked. now the cold air intake is sitting on the floor next to his bent forged piston and the pieces that were once his piston dome. That extra 5 hp was reallly worth it! He hates that I remind him, but since I have to R&R his engine, I owe it to myself.

Stick with a K&N drop in filter unless you plan on making other engine mods.