The Blox Racing Block Guard is an economical way to add some extra strength to your blocks cylinder sleeve structure. The block guard fits snug around the cylinder sleeves, thus providing extra protection under extreme stress and fatigue of the cylinders. The Blox Racing Block Guard also allows for sufficient cooling of the block by allowing coolant to flow through it's normal path via "drilled" passages in the block guard. The block guard is a good choice on all motor applications and mild turbo or nitrous.
Remember that a block guard does not suffice as a sleeved block!