Whilst i have ran with 100% meth you're supposed to mix it 50/50 with water so that it's not volatile . But you probably know that ;-)
No the plastics come in that horrible dark grey, I had them painted as well as the front lower grill and the rear plastics.
I tuned with both, despite my previous cars also showing my 100% meth made more power, I gave different mixes a shot. In the end, it was really obvious that 100% meth cooled better and made more power. The one catch was... Running 50/50 meant running a smaller jet. It didn't like the bigger jet with 50/50 at all. With 100%, It let me run the bigger jet and drop charge temps a lot better.
But that's just my experience on it
Grey? At least our US cars got sorta black plastic fog light bezels. I have to admit, no way I could do the "up keep" on shiny front bumper parts, lol.
What kind of boost pressure does that setup run?