In the last few days i have noticed an odd rattle it sounds like my Y-pipe is hitting something i can only hear it under 2700 rpm and its worse when my car is ideling down in gear my y-pipe is touching my oil pan but it has been that way since install about 10 months ago i also get a vibrations when my car passes 65 mph know i have a lower ball joint that is slightly bad but ive seen worse with no problems. please help with any idea on how to fix these two problems