VW Beetle and VW Super Beetle 70-79
VW Karmann Ghia 55-74
VW Bus 1950-70
VW Type 3 61-73
VW Thing 73-74

Note: 26 mm gears provide more moderate
and desirable oil pressure than 30mm
Aluminum housings and steel alloy gears make for
superior performance. The aluminum housing expands
and contracts with heat fluctuations at the same rate
as the engine case so the possibility of leakage is minimal.
 
Flat faced cams were used until 1970, but engines built
using aftermarket cams with bolt on cam gears will also
use a flat faced cam regardless of year