The head most definitly needs to come off if its a valve prob.
A VRS kit is like a bag full of all the seals and gaskets you will need like intake gasket, exhaust gasket, head gasket, cam cover gasket/s, thermostat gasket, water pump gasket (if you change it), new cam seals, 'd' rubbers, cam cover bolt seals and any other gaskets and o-rings you may need to disturb to get the head off. Its cheaper than buying each seperately and way better than using the old ones. Be sure to buy a little bottle of 'permatex' or somthing similar to put on the water gaskets (thermostat, water pump, o'rings on water pipes etc).