what's wrong with your car? maintenance problems?
and I think you'll be okay....regardless, you'll probably want to modify the lip when you get it installed anyway, because the original design- as you can see - is a closed circle that won't fit many mufflers, and doesn't look that good
so if when you get it installed, you widened it to accomodate your muffler, you should be okay
but that is also presuming that your muffler doesn't stick too far out either tho
here's a pic of my rear before I went to an exhaust shop to get some custom repiping done and had them push out my muffler and center it better while they were at it