I'm currently preparing to do the 00VI swap on my car, but my manifold looks a little, I don't know, "dull." It looks almost gray-ish right now. I've tried using just Plastix plastic polish on it and that didn't help. So, I was curious what you 5th gen guys do to keep your manifolds looking nice and black and shiny.

 

Yours is grey from sun exposure!
All mine needed was foam glass cleaner + some STP(plastic/vinyl protectant)
Paint it

 

You joke about painting it, but I think I just might. It would help cover up the sanding marks I left trying to get stupid painted-on letters (from the junkyard, inventory #'s I guess) off as well. If I do it'll definitely be black, though.

 

Sand it all and paint with some high temp engine paint. Put some design in it tho, like Nissan in silver or something.

 

I dunno about the design