Be REALLY careful separating the exhaust housing, especially if you have a ceramic exhaust wheel. I recommend loosening the bolts but not removing them altogether, so you can tap the exhaust housing to free it up, but don't have to worry about it coming all the way off and hitting the wheel. Then take the botls out completely, and a twisting motion is usually the best way to separate. BE CAREFUL OF THE EXHAUST WHEEL! It's mega-easy to break fins off.