Moroso 1 3/8in-12 Thread Aluminum Filler Cap Kit - Black Anodized

This Moroso filler cap is made from aluminum and features a 1 3/8in-12 thread size. The black anodized finish not only looks sharp but also helps protect the aluminum from corrosion. It's a well-built replacement for a damaged or missing cap, ensuring your cooling system stays sealed.

The aluminum construction makes this cap lightweight, and the anodized coating adds a layer of durability. It's designed to thread securely onto compatible radiators or expansion tanks, helping to maintain proper system pressure. This is a straightforward part to swap out if yours is worn or no longer sealing correctly.