I want to take the two corners bumpers off of the back of my 8. There are two little plastic "pin bolts" that are holding these pieces on from the bottom. Usually, you pull the center piece out a little, and the whole thing just pops off, but these won't budge. Is there a trick to them? Should I just cut them off, and replace them with other plastic bolts? Whats the deal?

 

there is actually 4 plastic bolts...they are actually called pressureless bolt, all you need is a flat head screwdriver to take them out...but not sure what you mean by two corner bumper...behind the mat there is also 2 nut screw on each tail light and a slap on plastic to keep tail light from moving, next to the tail light there is 2 more screws deeper inside, below the car there is 3 big pressureless screws, at the rear wheel there should be like 4 or 5 pressureless screws, if you are planning to remove the rear bumper you'll need to take out all those screws listed above

 

Not sure if this will your situation. Personally I've never removed the rear bumper. https://www.rx8club.com/showthread.p...ghlight=bumper

 

flat screwdriver is your best bet. and a lott of etching it lil by lil.