how do you guys deal with dealerships if you're car's still under warranty but you have some mods. i have an x-pipe and catback but my warranty's good for 7 yrs or 70,000 miles. right now i'm at 5 yrs and 46,000 miles. i drove in snow for an hour and a half friday and my car hates me for it because something's either severely wrong in the driveline possibly clutch, or my dad thinks it could be a bearing. when i was at red lights once i got off the highway the oil pressure would blip to nothing sporadically. anyone have any advice?