The Freightliner M2 Business Class Fuel Tank Caps product lineup offers a wide range of high-quality replacement fuel and DEF caps designed to fit Freightliner trucks. These caps provide a secure and leak-proof seal to prevent fuel or diesel exhaust fluid from spilling, ensuring reliable fuel system performance. The selection includes durable plastic and metal caps, both locking and non-locking options, along with specialized adapters and gaskets to ensure a perfect fit. Whether you need a replacement for a worn-out cap or want to upgrade to a more secure locking model, this product lineup has the parts you need to keep your Freightliner M2 or Cascadia running smoothly and efficiently. Enhance your truck's functionality and protection with the top-of-the-line fuel tank caps from this comprehensive Freightliner parts collection.