This is a LSX LS1/LS6/LS2/LS3/LS7 Billet Black Valve Cover Oil Cap w/ -6 AN Fitting, most guys use this to install a catch can. Item shipped as shown
This valve cover adapter replaces the original oil fill tube on the factory valve cover. It is CNC-machined from billet aluminum for precise fit then anodized black, and the included silicone O-ring is specially designed to prevent oil seepage at the base of the adapter.
The top of the adapter is machined to accept a -6 AN hose end to facilitate the installation of a custom crank case evacuation system, PCV system, or for use with a vacuum pump.
Total adapter length is 2.00″.