You know, I had this same issue the other day when I changed my oil. I noticed that that tube was beginning to rust or something. I also noticed that my o-ring was really dry. I put some o-ring conditioner on there but I forgot about it until I read this post. I should probably go check on it
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2005 T4R Limited
custom grille grating, Borla Dual Catback, rubberized undercoating skid plates, LED replacements, stainless steel shift knob, '06+ JBL HU, iPod adapter USA Spec