Oil Cap Attachment:

Add that last little custom touch to your engine by adding one of these billet aluminum oil fills to your valve covers. Precision CNC machined, the kit includes a high-tech contoured style cap and a threaded bung that can be bolted or welded on to your covers or other fluid tank. The mounting base of the bung is 2 1/4" diameter and the threaded area is 1 1/2".