All they are is a fancy vanity cover.....I opted for the full tilt boogie.....got a marine valve cover for my '03......looks tons better IMO.
They are for 03-05 only, FYI. I wish they had them on clearance for 06+ I would be all over them then.
Plug the stock breather and add them to the top like mine.I have the marine cover also. My only complaint is the breather line are a pain in the a$$ to take on and off