If you have an 8 valve car, you have these things holding your exhaust to the exhaust manifold.
These clamps are really really really really springy. Don't be thinkin your gona pry it on or off with a screw driver.
Use a muffler clamp. Flip it all around like you see in the picture. Make sure the "c" thing is right in the middle or it will fly off and poke your eye out.
Turn the nuts even, and the clamp will open up nice.