1. Roland Sands Design Clarity Line <$500

RSD Clarity Line

If you’re a gearhead like us, then you like seeing how things work. This is especially true with engines. Which is why we think the Clarity line from Roland Sands Design is particularly clever. Available for virtually any H-D or S&S engine from 1993 onward, each is constructed from a combination of transparent polycarbonate and machined billet aluminum to give you a peek inside the various parts of your engine. Currently available options from the Clarity line include air cleaners, clutch covers, rocker box covers, transmission covers, derby covers, and cam covers, and all are under the $500 limit for this list. Each piece is available in chrome, black, or a combination of the two, and are sure to attract hypnotizing stares wherever they go.