Chassis Stiffening Plate and Muffler? I just ordered my Pri yesterday. So I can't just go out to the driveway and LOOK to get an answer on this. From the photos, it seems this plate needs to be removed each time you have a muffler change? On my other cars, I've always gone to Midas for mufflers; and they last me perhaps 2 years and I need a new one. I saw a few threads about the stiffening plate, who likes it, what it does etc. But I didn't find anything re it's interaction with muffler changes. Just wondering if anyone has an experience with this?