DEI Protect-A-Boot and Wire 4 Cylinder Kit - BlackProtect A Boots solve the problem of burning and cracking plug boots and wires from header and engine heat. Features Made from a high temperature, nonflammable glass fiber material able to withstand temperatures up to 1000F. Boots are of double wall construction. Advantages Boots & Sleeving provide protection against harmful, high under hood temperatures. Shrink tubes are included to provide a water tight seal. Benefits Protecting spark plug boots &