HINSON Spark Plug Wire Heat Boots Heat Protection 8 Cyl - 8.5" Long Black MADE IN USA. Street and Race Performance Protection. Made for the LS/Vortec and C7 LT1 engines 8" Boots - Full Wire Coverage. From Cylinder Head to Coil Two layers of fiberglass help insulate and protect wires from temperatures up to 1200 F Purchase from Hinson Motorsports with peace of mind and security. Buy with confidence because Hinson Motorsports backs its products 100 percent Boots are designed to protect the spark plug wire and boot from damage due to the exhaust manifold heat