I recently removed intake mani to replace glow plugs while doing a frybrid install. When I removed intake mani I couldnt believe what I saw

Black gunk on everything in there. Heres a pic --



I tried to clean it but its everywhere - all over the valves, down all the intake runners. Im shocked this car still runs so well - there must be 1/8" build up on everything! Now I know where all that black soot comes from when I floor it

Is there a product I can use like seafoam to clean this ?

__________________
Paul
Benz-less
I need an SDL !