Noticed my lift pump pressure was slowly decreasing even after replacing my filter. Figured my L.P. was on its way out. Dropped the tank to install the FASS and I find this. Small metal shavings and what looks like a graphite material. The inside of the tank was "clean" nothing major floating around. I rinsed the tank out several times with clean diesel and installed the FASS with a sump got tired last night so I'm finishing this morning. My question is how screwed am I? My fuel pressure gauge usually ran around 10, 9-8 when I needed a new filter. In the last week it got to around 7 running down the road. Also since im solving the lack of fuel issue now with the FASS will the damage stop or at least slow down? Thanks for any input, I love this truck but damn I'm getting tired of working on it. 06, 3500 with 137k on it.