These boots are designed to protect the spark plug wire and boot from damage due to the exhaust heat. They will also provide some protection to the wires if they come loose from the harness and lay on exhaust components. These two layers of fiberglass help insulate and protect wires from temperatures up to 1200° F. 

For the LS, Viper and other engine configurations that short plug wires and per cylinder coil packs, the 8" no ring boots are the best option. They do a great job protecting the plug wires and boots from thermal damage. 

LS Spark Plug Wire Boots - Fiberglass or Titanium LS1 LS2 LS3 LS6 LS7 LSA LQ9