DC2R head = B16A head with factory polish job

VTiR head is unique to VTiR and is not used on any other car. the port angles are different which can help at over 8000rpm (so the experts say)

Terrible One:

B20B with VTEC Head:

http://www.ozhonda.com/forum/showthread.php?t=16816
http://www.ozhonda.com/forum/showthread.php?t=38805