All supplied boots are of the finest quality in the industry and exceed factory specifications. The silicone boots use a 4ply high temperature Nomex fiber for increased high temperature strength and long term durability. As well the boots are lined with flurosilicone to prevent the oil from reducing the operational life. All the clamps are made of stainless steel, with the heavy duty clamps providing over 400 lbs of clamp force. All supplied boots are of the finest quality in the industry and exceed factory specifications. The silicone boots use a 4ply high temperature Nomex fiber for increased high temperature strength and long term durability. As well the boots are lined with flurosilicone to prevent the oil from reducing the operational life. All the clamps are made of stainless steel, with the heavy duty clamps providing over 400 lbs of clamp force.