We took off the intake manifold today, to install a set of STi RA TGV stacks, and I looked into the cylinder head where the valves are and noticed the walls had a green coloration to them. I have no idea what is causing that. Maybe the fuel I'm using? I use 100 octane regularly. But I'm not sure its that. Anyone else experience this?

 

if its green maybe coolent good luck

 

hey if you want to get rid of your stock tgv's i could use one... my lh one is stuck shut. pm me if you want. thanks

 

got your message and replied...