Seems new in Vans webstore, they are now selling Lycoming factory experimental engines : XO-320, XO-360.......
The price difference between certified and XO being visible here
http://www.vansaircraft.com/pdf/lycoming_order_form.pdf
On the order form they are also indicating that all engines are equipped with :
roller tappets, dual magnetos, ignition harness, fuel pump, starter, vacuum pump drive, prop governor drive, and carburetor/injector.
The price difference between certified and XO being visible here
http://www.vansaircraft.com/pdf/lycoming_order_form.pdf
On the order form they are also indicating that all engines are equipped with :
roller tappets, dual magnetos, ignition harness, fuel pump, starter, vacuum pump drive, prop governor drive, and carburetor/injector.