Directly replaces the original oil fill cap. Reusing your original O-ring. Fully CNCd of aluminum in house. Shown standard machined finish (polished and anodized are extra options depending on availability, see pic below). For all Ecotec 4cyl B207 2003-11 (short), 6cyl (tall)
Since this cap is also shared across many GM platform engines we can do other custom logos. Email or call to discuss.