Looks nasty, I did mine at 18,000 miles when I did the kenne bell and it was nasty how hard was it to get clean. I imagine a case or more of brake cleaner?
Yea it took about 8 cans of cleaner, took it right off. The worst part was waiting for it to dry. Running awesome now. Had ordered a JLT separator and it gets here tomorrow. Letting it sit until I get it so I won't have to do it again. Diff notice a difference in sound and throttle response.