2002 Passat 1.8t catalytic converter replacement.
What a pain in the ass. You can't remove the cat without removing the airbox. You can't reach the back flange without disconnecting the downpipe and removing the whole thing. You can't remove the while thing without bending back the factory tab on the downpipe bracket and getting the car two feet in the air in order to wiggle that fucking puzzle out the top.
I hate shit like that.