I sprayed mine. I loosened one pretty easily with a wrench but another was tight. I Need to get a deep 15MM while they hydrate.I'm dropping my headpipe(s) tomorrow to get to the trans TECHM, already started soaking the flange bolts with PB Blaster in hopes to get them off without stripping/breaking the studs. I'll try to keep a log of how it goes and what the flexpipe looks like once that's down.