Engine › HEAD SHELL (BLACK) HEAD SHELL (BLACK) $0.00 Machined with a flow-thru design for optimum coolingFlow-thru design also increases coolant capacityUtilizes the stock cylinder head studsMachined from 6061 aluminum and polished to a mirror finishWill accept the NOSS or Pro Design dome Quantity: Purchase Added! Machined with a flow-thru design for optimum coolingFlow-thru design also increases coolant capacityUtilizes the stock cylinder head studsMachined from 6061 aluminum and polished to a mirror finishWill accept the NOSS or Pro Design dome