These are made to protect the heart of your Truck in case of a rollover, its a terrible way to end your day when the engine is damaged after a roll. In most cases engine damage is more expensive to repair and a "soft" roll would not put you out of the race. These are made from 3/16" plate and laser cut for accuracy. They come in sets of 4 plates to cover both sides and have 3/8" holes. They are not limited to engine protection so use your imagination with them! Lastly, they have 3 options to choose from, do you want to run 1.25", 1.5", or 1.75" tubes.