That's why there's CEG. 'Cause parts guys & dealer grease monkeys don't know JACK about our cars.
The B-12 will be fine for the intake - which is aluminum by the way, not plastic. All you may need is a $4 TB gasket, but I never had to install one as it wasn't damaged upon removal. Soon as you pull the TB off & peel the gasket off the intake, you'll see the gunked up passages. Enjoy.
NOTE:
When you re-install the TB, be sure to snug the bolts up by hand first & gradually tighten them evenly. I've heard of people torquing down the bolts one at a time then complaining about air leaks. Just tighten the bolts gradually so the TB stays relatively flush against the UIM flange as you tighten. I would suggest two 1/4 turns on each bolt in an X pattern until tight. And don't over tighten is a good habit to get into. The head, block, and UIM/LIM are aluminum & will strip out more easily than iron pieces, so no gorilla man on the engine please. Common sense really.
