Brazil’s Motorav is showing the latest version of their VW-based aircraft powerplant. There are so many differences that the VeeDub link is very thin indeed.
The dual plug heads are a good example, they include individual valve covers (which don’t leak!) and hydraulic valve lash adjustment. The case is also proprietary. Note the relocated oil cooler; remote coolers are also available. Ignition is dual electronic. Fuel metering is via an updraft throttle body injector. All in all, a very nice unit.