If you're looking to get the most out of your VW build, you'll want this 1963-1979 Big Mouth Windage Push Rod Tube! The windage tube design extends further into the engine case to prevent oil from over filling the valve covers during cornering, side hilling in the dunes, or any hard race use. This tube also has a wide opening at the cylinder head for push rod clearance when using high ratio rocker arms.