Collector Cover

Very simple. Remove the 6 bolts. Get the thing sandblasted. If you only do this you'll have something that looks like this:

I liked this look, but as I finished other parts of my engine bay (in yellow), the sandblasted only cover really lost its attention and the engine didn't look very good. So I went to the next step. Paint the Collector Cover whatever color you want, preferrable with high heat paint. let it cure as necessary. Then use a plane sander or something, and sand the flat surface of the Collector Cover until its as shiny as Chrome (which I still need to do...I just used a rotary sander and it didn't turn out how I wanted). Now you have a perfect collector cover. You can give it a coat of high heat clear enamel now to protect it forever or just use some aluminum polish on it every once in a while and it'll stay nice and shiny.

Remember there are many other Aluminum parts on your Z, like the wheels...don't forget to give them some attention, too.