You can improve the appearance of your engine bay and many ways.  One of the simplest is to replace your factory oil cap with a Fujita Billet Aluminum oil cap. They are made of high quality aluminum that's built to last. This adds a style and cool tuner design under the hood of your car. This compliments your Fujita intake system very nicely. This oil cap will also be a great replacement if lost or damaged in the process of an oil change or service. Simply unscrew your OEM oil cap and replace with this billet aluminum oil cap.