synthetek industries makes a product called synthelator , 10 ml injected just pre contest dries u out and brings out ur vascularity like nothing esle out there .
and ofcourse there's the old technique of sippin on red vine before contest .
while this goes for pre contest vascularity , u can use aldatizide or just plain aldactone ,3 days out which will help u lower aldosterone levels allowing u to come in much harder as its a major impediment towards further muscular definition .