Hi Speedy Pete: I don't know about the 355 exhaust swap, but I know on my TR it's not that big a deal. I think any of the mid-engine Ferrari exhaust systems are fairly easy to remove and install. I have removed my exhaust twice for various reasons, simply jacking the car up and using stands. You should be able to re-use the doughnuts if your careful too. Just take your time and you'll probably be fine. You may want a helper around if it's too heavy, my TR's system is probably 100+ pounds or so complete. Also be careful about scratching or chipping any painted surfaces around the exhaust tips, use rags and common sense. I'm sure somebody else can chime in here with 355 experience.