We had a "hot rod" themed wedding we used alot of "old" things both automotive and not as decorations. These were 5 quart oil cans from the 50's with a vase inside them as table settings.
TURBO CUFFLINKS! Chrome Mini cuff links in the shape of a turbo. This would be super cute for a weddding idea, or have each groomsmen get cuff links with the emblem of his car (Honda, Subaru, Nissan, etc)