The Bimmian Aluminum Oil Cap is the perfect accessory to improve the look of your factory engine oil cap. Add a subtle accent to your engine bay with our chrome, beryllium and brushed aluminum oil caps. These oil caps fit a wide variety of models including the 323, 325, 328, 330, 335, 535, 540 and many more.Unlike competitors products, these caps are made exclusively for Bimmian.com from a solid single piece of aluminum, crafted using the latest billet technology. This single piece approach prevents leaks, maintaining oil pressure as per the OEM cap, while simultaneously preventing oil leakage through the multiple parts of the cap.Bimmian Aluminum Oil Cap Features: