Cleaned my 04 gp gt1 the other day, found this under my floor mat and also damp carpet:



Also the car has smelled funny lately, so off to gpf.net. Went and got a cabin air filter and the $3 plenum water diverter and finally got it put in today. Here is a comparison of the old filter to the new one, kinda explains a lot:



Couple pics of the plenum in place:





Needless to say the air coming out of the vents already smells better. Feelsgoodman